diff --git a/Cargo.lock b/Cargo.lock
index 808da012..c751ee84 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -72,7 +72,7 @@ checksum = "366ffbaa4442f4684d91e2cd7c5ea7c4ed8add41959a31447066e279e432b618"
 [[package]]
 name = "acadrust"
 version = "0.4.1"
-source = "git+https://git@github.com/HakanSeven12/cadcodec.git?rev=5b2ae66#5b2ae66d0bd7b0da2d13392d3c3332f8a39caa1f"
+source = "git+https://git@github.com/HakanSeven12/cadcodec.git?rev=564859e#564859e77197fdb98193b2477115709e6821229b"
 dependencies = [
  "ahash 0.8.12",
  "anyhow",
diff --git a/Cargo.toml b/Cargo.toml
index dc49bfb1..af5833c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ glam = { version = "0.33", features = ["bytemuck"] }
 rfd = "0.17"
 clap = { version = "4", features = ["derive"] }
 env_logger = "0.11"
-acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "5b2ae66", features = ["serde"] }
+acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "564859e", features = ["serde"] }
 cadkernel = { git = "https://github.com/HakanSeven12/cadkernel.git", rev = "b2b1d4b", features = ["acis", "offset"] }
 dwg-thumbnailer = { path = "crates/dwg-thumbnailer" }
 flate2 = "1"
@@ -61,7 +61,7 @@ iced_core = { git = "https://github.com/iced-rs/iced.git", rev = "23604ff22ab0aa
 iced_widget = { git = "https://github.com/iced-rs/iced.git", rev = "23604ff22ab0aad9e00b9327cb7b8546ed84db39" }
 
 [patch."https://github.com/HakanSeven12/cadcodec.git"]
-acadrust = { git = "https://git@github.com/HakanSeven12/cadcodec.git", rev = "5b2ae66" }
+acadrust = { git = "https://git@github.com/HakanSeven12/cadcodec.git", rev = "564859e" }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 ocs_plugin_api = { path = "crates/ocs_plugin_api", features = ["host"] }
diff --git a/src/app/command_driver.rs b/src/app/command_driver.rs
index d35a3225..4f32d776 100644
--- a/src/app/command_driver.rs
+++ b/src/app/command_driver.rs
@@ -1246,6 +1246,12 @@ impl OpenCADStudio {
                     .document
                     .header
                     .dimension_associativity;
+                let single_source_dimension = matches!(
+                    &entity,
+                    acadrust::EntityType::Dimension(
+                        acadrust::entities::Dimension::Ordinate(_)
+                    )
+                );
                 let pending = if association_mode == 0 {
                     let layer = self.tabs[i].active_layer.clone();
                     if layer != "0" || entity.as_entity().layer().is_empty() {
@@ -1295,7 +1301,13 @@ impl OpenCADStudio {
                         if association_mode == 2 {
                             let sources = source.map_or_else(
                                 || self.tabs[i].scene.infer_dimension_sources(handle),
-                                |source| [Some(source), Some(source)],
+                                |source| {
+                                    if single_source_dimension {
+                                        [Some(source), None]
+                                    } else {
+                                        [Some(source), Some(source)]
+                                    }
+                                },
                             );
                             self.tabs[i]
                                 .scene
@@ -3066,7 +3078,6 @@ impl OpenCADStudio {
                                     stretched |= mv(&mut d.definition_point);
                                 }
                                 Dimension::Ordinate(d) => {
-                                    stretched |= mv(&mut d.definition_point);
                                     stretched |= mv(&mut d.feature_location);
                                     stretched |= mv(&mut d.leader_endpoint);
                                 }
diff --git a/src/app/update/command.rs b/src/app/update/command.rs
index ab25667d..8b753705 100644
--- a/src/app/update/command.rs
+++ b/src/app/update/command.rs
@@ -1154,10 +1154,17 @@ pub(super) fn on_tab_close(&mut self, idx: usize) -> Task<Message> {
                         .zip(self.tabs[i].selected_grips.iter())
                         .find(|(owner, g)| **owner == popup.handle && g.id == popup.grip_id)
                     {
-                        // "Move with Leader" drags the whole multileader; the
-                        // others move just the picked grip.
+                        // The synthetic whole-object grip is specific to a
+                        // multileader. Dimension text grips implement their
+                        // own leader relationship and must keep their real ID.
+                        let is_multileader = matches!(
+                            self.tabs[i].scene.document.get_entity(popup.handle),
+                            Some(acadrust::EntityType::MultiLeader(_))
+                        );
                         let (grip_id, is_translate) =
-                            if matches!(item.action, GripMenuAction::MoveWithLeader) {
+                            if matches!(item.action, GripMenuAction::MoveWithLeader)
+                                && is_multileader
+                            {
                                 (crate::entities::multileader::MOVE_ALL_GRIP, true)
                             } else {
                                 (popup.grip_id, g.is_midpoint)
diff --git a/src/command.rs b/src/command.rs
index 797b27b4..a79db230 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -1212,7 +1212,7 @@ pub enum CmdResult {
     CommitEntitiesAndExit(Vec<EntityType>),
     /// Commit an acadrust entity to the document and end the command.
     CommitAndExit(EntityType),
-    /// Commit a linear/aligned dimension using the drawing's association mode.
+    /// Commit a dimension using the drawing's association mode.
     /// Object-selection workflows may retain their source.
     CommitDimension {
         entity: EntityType,
diff --git a/src/entities/dimension.rs b/src/entities/dimension.rs
index ae303266..b49fde1a 100644
--- a/src/entities/dimension.rs
+++ b/src/entities/dimension.rs
@@ -124,6 +124,23 @@ fn properties(dim: &Dimension) -> Vec<PropSection> {
             ],
         }];
     }
+    if let Dimension::Ordinate(d) = dim {
+        return vec![PropSection {
+            title: t!("Misc").into_owned(),
+            props: vec![
+                Property {
+                    label: t!("Dimension style").into_owned(),
+                    field: "style_name",
+                    value: PropValue::PlainText(d.base.style_name.clone()),
+                },
+                edit_angle(
+                    t!("Rotation").as_ref(),
+                    "ordinate_rotation",
+                    -d.base.horizontal_direction.to_degrees(),
+                ),
+            ],
+        }];
+    }
     let mut props = base_props(dim.base());
     match dim {
         Dimension::Aligned(d) => {
@@ -351,6 +368,40 @@ fn assign_deg(value: &str, target: &mut f64) -> bool {
 }
 
 fn apply_geom_prop(dim: &mut Dimension, field: &str, value: &str) {
+    let ordinate_auto_text = match dim {
+        Dimension::Ordinate(ordinate) if !ordinate.base.text_user_positioned => {
+            Some(dimension_text_pos_f64(dim, None, 2.5, 1.0))
+        }
+        _ => None,
+    };
+    if let Dimension::Ordinate(ordinate) = dim {
+        match field {
+            "ordinate_rotation" => {
+                if let Some(angle) = parse_f64(value) {
+                    ordinate.base.horizontal_direction = -angle.to_radians();
+                    ordinate.refresh_measurement();
+                }
+                return;
+            }
+            "text_x" | "text_y" => {
+                let old_text = ordinate_auto_text.unwrap_or(ordinate.base.text_middle_point);
+                let mut new_text = old_text;
+                let changed = if field == "text_x" {
+                    assign_f64(value, &mut new_text.x)
+                } else {
+                    assign_f64(value, &mut new_text.y)
+                };
+                if changed {
+                    let delta = new_text - old_text;
+                    ordinate.leader_endpoint = ordinate.leader_endpoint + delta;
+                    ordinate.base.text_middle_point = new_text;
+                    ordinate.base.text_user_positioned = true;
+                }
+                return;
+            }
+            _ => {}
+        }
+    }
     if apply_base_prop(dim.base_mut(), field, value) {
         return;
     }
@@ -709,6 +760,42 @@ fn apply_large_radial_fields(d: &mut DimensionLargeRadial, field: &str, value: &
 }
 
 fn apply_transform(dim: &mut Dimension, t: &EntityTransform) {
+    if matches!(dim, Dimension::Ordinate(_)) {
+        match t {
+            EntityTransform::Translate(delta) => dim.translate(Vector3::new(
+                delta.x, delta.y, delta.z,
+            )),
+            EntityTransform::Rotate {
+                center,
+                axis,
+                angle_rad,
+            } => crate::scene::view::transform::apply_standard_transform(
+                dim,
+                *center,
+                *axis,
+                *angle_rad,
+            ),
+            EntityTransform::Scale { center, factor } => {
+                crate::scene::view::transform::apply_standard_scale(dim, *center, *factor)
+            }
+            EntityTransform::Mirror {
+                p1,
+                p2,
+                working_normal,
+            } => acadrust::Entity::apply_transform(
+                dim,
+                &crate::scene::view::transform::reflection_about_working_line(
+                    *p1,
+                    *p2,
+                    *working_normal,
+                ),
+            ),
+            EntityTransform::Affine(transform) => {
+                acadrust::Entity::apply_transform(dim, transform)
+            }
+        }
+        return;
+    }
     match t {
         EntityTransform::Translate(d) => dim.translate(acadrust::types::Vector3::new(
             d.x as f64, d.y as f64, d.z as f64,
@@ -1193,10 +1280,9 @@ impl Grippable for Dimension {
                 center_grip(4, text),
             ],
             Dimension::Ordinate(d) => vec![
-                square_grip(0, dv3(&d.definition_point)),
-                center_grip(1, dv3(&d.feature_location)),
-                center_grip(2, dv3(&d.leader_endpoint)),
-                center_grip(3, text),
+                square_grip(0, dv3(&d.feature_location)),
+                center_grip(1, dv3(&d.leader_endpoint)),
+                center_grip(2, text),
             ],
             Dimension::Arc(d) => {
                 let mut grips = vec![
@@ -1227,12 +1313,25 @@ impl Grippable for Dimension {
 
 
     fn apply_grip(&mut self, grip_id: usize, apply: GripApply) {
+        if matches!(self, Dimension::Ordinate(_)) && grip_id == 2 {
+            let old_text = dimension_text_pos_f64(self, None, 2.5, 1.0);
+            let mut new_text = old_text;
+            apply_to_v3(&mut new_text, &apply);
+            let delta = new_text - old_text;
+            if let Dimension::Ordinate(d) = self {
+                d.leader_endpoint = d.leader_endpoint + delta;
+                d.base.text_middle_point = new_text;
+                d.base.text_user_positioned = true;
+                d.refresh_measurement();
+            }
+            return;
+        }
         // Last grip always moves the text.
         let text_grip = match self {
             Dimension::Linear(_) | Dimension::Aligned(_) => 3,
             Dimension::Radius(_) | Dimension::Diameter(_) => 2,
             Dimension::Angular2Ln(_) | Dimension::Angular3Pt(_) => 4,
-            Dimension::Ordinate(_) => 3,
+            Dimension::Ordinate(_) => 2,
             Dimension::Arc(d) => if d.has_leader { 6 } else { 4 },
             Dimension::LargeRadial(_) => 4,
         };
@@ -1288,9 +1387,15 @@ impl Grippable for Dimension {
                 _ => {}
             },
             Dimension::Ordinate(d) => match grip_id {
-                0 => apply_to_v3(&mut d.definition_point, &apply),
-                1 => apply_to_v3(&mut d.feature_location, &apply),
-                2 => apply_to_v3(&mut d.leader_endpoint, &apply),
+                0 => apply_to_v3(&mut d.feature_location, &apply),
+                1 => {
+                    let old = d.leader_endpoint;
+                    apply_to_v3(&mut d.leader_endpoint, &apply);
+                    if d.base.text_user_positioned {
+                        d.base.text_middle_point =
+                            d.base.text_middle_point + (d.leader_endpoint - old);
+                    }
+                }
                 _ => {}
             },
             Dimension::Arc(d) => match grip_id {
@@ -1326,7 +1431,7 @@ impl Grippable for Dimension {
             Dimension::Linear(_) | Dimension::Aligned(_) => (2, 3),
             Dimension::Radius(_) | Dimension::Diameter(_) => (1, 2),
             Dimension::Angular2Ln(_) | Dimension::Angular3Pt(_) => (3, 4),
-            Dimension::Ordinate(_) => (0, 3),
+            Dimension::Ordinate(_) => (1, 2),
             Dimension::Arc(d) => (3, if d.has_leader { 6 } else { 4 }),
             Dimension::LargeRadial(_) => (3, 4),
         };
@@ -1365,6 +1470,11 @@ impl Grippable for Dimension {
                     action: GripMenuAction::Center,
                 },
             ]
+        } else if matches!(self, Dimension::Ordinate(_)) {
+            vec![GripMenuItem {
+                label: "Stretch",
+                action: GripMenuAction::Stretch,
+            }]
         } else if grip_id == dim_line_grip {
             vec![
                 GripMenuItem {
@@ -1394,7 +1504,7 @@ impl Grippable for Dimension {
             Dimension::Linear(_) | Dimension::Aligned(_) => (2, 3),
             Dimension::Radius(_) | Dimension::Diameter(_) => (1, 2),
             Dimension::Angular2Ln(_) | Dimension::Angular3Pt(_) => (3, 4),
-            Dimension::Ordinate(_) => (0, 3),
+            Dimension::Ordinate(_) => (1, 2),
             Dimension::Arc(d) => (3, if d.has_leader { 6 } else { 4 }),
             Dimension::LargeRadial(_) => (3, 4),
         };
@@ -1441,7 +1551,7 @@ impl Grippable for Dimension {
             Dimension::Linear(_) | Dimension::Aligned(_) => 3,
             Dimension::Radius(_) | Dimension::Diameter(_) => 2,
             Dimension::Angular2Ln(_) | Dimension::Angular3Pt(_) => 4,
-            Dimension::Ordinate(_) => 3,
+            Dimension::Ordinate(_) => 2,
             Dimension::Arc(d) => if d.has_leader { 6 } else { 4 },
             Dimension::LargeRadial(_) => 4,
         };
@@ -1682,7 +1792,7 @@ pub fn style_sections(
         _ => choice_value("None", &["None", "Background", "Color"]),
     };
 
-    vec![
+    let mut sections = vec![
         PropSection {
             title: t!("Lines & Arrows").into_owned(),
             props: vec![
@@ -2312,7 +2422,52 @@ pub fn style_sections(
                 ),
             ],
         },
-    ]
+    ];
+    if matches!(dimension, Dimension::Ordinate(_)) {
+        for section in &mut sections {
+            section.props.retain(|property| match section.title.as_str() {
+                title if title == t!("Lines & Arrows").as_ref() => matches!(
+                    property.field,
+                    "dim_arrow_size"
+                        | "dim_ext_line_lineweight"
+                        | "dim_ext_line_fixed"
+                        | "dim_ext_line_fixed_length"
+                        | "dim_ext_line_color"
+                        | "dim_ext_line_offset"
+                ),
+                title if title == t!("Text").as_ref() => !matches!(
+                    property.field,
+                    "dim_text_outside_align" | "dim_text_pos_hor" | "dim_text_inside_align"
+                ),
+                title if title == t!("Fit").as_ref() => matches!(
+                    property.field,
+                    "dim_text_movement" | "dim_scale_overall"
+                ),
+                _ => true,
+            });
+        }
+        let dim_scale = if s.dimscale > 1e-6 { s.dimscale } else { 1.0 };
+        let text_position = dimension_text_pos_f64(
+            dimension,
+            Some(s),
+            real(ov::DIMTXT, s.dimtxt) * dim_scale,
+            dim_scale,
+        );
+        for section in &mut sections {
+            for property in &mut section.props {
+                match property.field {
+                    "text_x" => {
+                        property.value = PropValue::EditText(format!("{:.4}", text_position.x));
+                    }
+                    "text_y" => {
+                        property.value = PropValue::EditText(format!("{:.4}", text_position.y));
+                    }
+                    _ => {}
+                }
+            }
+        }
+    }
+    sections
 }
 
 fn property(label: &str, field: &'static str, value: PropValue) -> Property {
@@ -3640,16 +3795,23 @@ fn dimension_geometry(
             );
         }
         Dimension::Ordinate(d) => {
-            add_segment(
-                &mut g.dim_lines,
-                lv(d.feature_location),
-                lv(d.definition_point),
-            );
-            add_segment(
-                &mut g.dim_lines,
-                lv(d.definition_point),
-                lv(d.leader_endpoint),
-            );
+            if !suppress.ext1 {
+                let fixed_length = params
+                    .dimfxlon
+                    .then_some(params.dimfxl.max(0.0) as f64);
+                let points = d.leader_polyline(
+                    (params.arrow_len * 2.0) as f64,
+                    params.dimexo as f64,
+                    fixed_length,
+                );
+                for pair in points.windows(2) {
+                    let start = lv(pair[0]);
+                    let end = lv(pair[1]);
+                    if (end - start).length_squared() > 1e-12 {
+                        add_segment(&mut g.ext_lines, start, end);
+                    }
+                }
+            }
         }
         Dimension::Arc(d) => {
             append_angular_dimension(
@@ -4061,7 +4223,6 @@ fn dimension_snap_pts(dim: &Dimension) -> Vec<(glam::DVec3, SnapHint)> {
             node(d.definition_point),
         ],
         Dimension::Ordinate(d) => vec![
-            node(d.definition_point),
             node(d.feature_location),
             node(d.leader_endpoint),
         ],
@@ -4271,6 +4432,8 @@ fn dimension_text_rotation(dim: &Dimension, style: Option<&DimStyle>) -> f64 {
     let outside = dimension_text_is_outside(dim, style);
     if base.text_rotation.abs() > 1e-9 {
         base.text_rotation
+    } else if matches!(dim, Dimension::Ordinate(_)) {
+        dimension_text_natural_rotation(dim)
     } else if base.horizontal_direction.abs() > 1e-9 {
         base.horizontal_direction
     } else if (outside && dimtoh) || (!outside && dimtih) {
@@ -4338,6 +4501,14 @@ fn dimension_text_natural_rotation(dim: &Dimension) -> f64 {
             let dy = d.second_point.y - d.first_point.y;
             dy.atan2(dx)
         }
+        Dimension::Ordinate(d) => {
+            let axis_rotation = -d.base.horizontal_direction;
+            if d.is_ordinate_type_x {
+                axis_rotation + std::f64::consts::FRAC_PI_2
+            } else {
+                axis_rotation
+            }
+        }
         _ => 0.0,
     };
     // Clamp to (-π/2, π/2] so text never appears upside-down.
@@ -5119,6 +5290,26 @@ fn dimension_text_pos_f64(
                 dimtad,
             )
         }
+        Dimension::Ordinate(d) => {
+            let (x_axis, y_axis) = d.local_axes();
+            let text_axis = if d.is_ordinate_type_x { y_axis } else { x_axis };
+            let perpendicular = if d.is_ordinate_type_x { x_axis } else { y_axis };
+            let delta = d.leader_endpoint - d.feature_location;
+            let direction_sign = if delta.dot(&text_axis) < 0.0 { -1.0 } else { 1.0 };
+            let perpendicular_sign = if delta.dot(&perpendicular) < 0.0 {
+                -1.0
+            } else {
+                1.0
+            };
+            let vertical = match dimtad {
+                0 => dimtvp * text_height,
+                4 => -perp_off,
+                _ => perp_off,
+            };
+            d.leader_endpoint
+                + text_axis * (direction_sign * (text_w * 0.5 + dimgap))
+                + perpendicular * (perpendicular_sign * vertical)
+        }
         _ => {
             // Non-linear (radius / diameter / angular / ordinate): lift the
             // natural mid point straight up by the style offset. A user-dragged
diff --git a/src/modules/annotate/ordinate_dim.rs b/src/modules/annotate/ordinate_dim.rs
index 203659bf..6370466c 100644
--- a/src/modules/annotate/ordinate_dim.rs
+++ b/src/modules/annotate/ordinate_dim.rs
@@ -32,9 +32,22 @@ enum Step {
     LeaderEndpoint { feature: DVec3 },
 }
 
+#[derive(Clone, Copy)]
+enum DatumMode {
+    Automatic,
+    X,
+    Y,
+}
+
 pub struct OrdinateDimCommand {
     step: Step,
     plane: WorkingPlane,
+    datum_mode: DatumMode,
+    text_override: Option<String>,
+    awaiting_text: bool,
+    mtext_override: bool,
+    text_angle: Option<f64>,
+    awaiting_angle: bool,
 }
 
 impl OrdinateDimCommand {
@@ -42,6 +55,12 @@ impl OrdinateDimCommand {
         Self {
             step: Step::FeaturePoint,
             plane: WorkingPlane::default(),
+            datum_mode: DatumMode::Automatic,
+            text_override: None,
+            awaiting_text: false,
+            mtext_override: false,
+            text_angle: None,
+            awaiting_angle: false,
         }
     }
 }
@@ -56,9 +75,23 @@ impl CadCommand for OrdinateDimCommand {
     }
 
     fn prompt(&self) -> String {
+        if self.awaiting_text {
+            return if self.mtext_override {
+                t!("DIMORDINATE  Enter formatted dimension text (blank = measured value):")
+                    .into_owned()
+            } else {
+                t!("DIMORDINATE  Enter dimension text (blank = measured value):").into_owned()
+            };
+        }
+        if self.awaiting_angle {
+            return t!("DIMORDINATE  Specify text angle (degrees):").into_owned();
+        }
         match self.step {
             Step::FeaturePoint => t!("DIMORDINATE  Specify feature location:").into_owned(),
-            Step::LeaderEndpoint { .. } => t!("DIMORDINATE  Specify leader endpoint:").into_owned(),
+            Step::LeaderEndpoint { .. } => t!(
+                "DIMORDINATE  Specify leader endpoint [Xdatum/Ydatum/Mtext/Text/Angle]:"
+            )
+            .into_owned(),
         }
     }
 
@@ -71,26 +104,105 @@ impl CadCommand for OrdinateDimCommand {
             Step::LeaderEndpoint { feature } => {
                 let feature = self.plane.to_local(feature);
                 let pt = self.plane.to_local(pt);
-                let is_x = is_x_type(feature, pt);
-                let elbow = ordinate_elbow(feature, pt, is_x);
+                let is_x = match self.datum_mode {
+                    DatumMode::Automatic => is_x_type(feature, pt),
+                    DatumMode::X => true,
+                    DatumMode::Y => false,
+                };
                 let mut dim = DimensionOrdinate::new(v3(feature), v3(pt), is_x);
-                // The leader is an orthogonal L from the feature to the
-                // endpoint; store its elbow as the definition point. Without it
-                // the renderer draws feature → (0,0,0) → endpoint, kinking the
-                // leader through the world origin. The old code also worked in
-                // the wrong (XZ) plane, dropping the Y coordinate. (#150)
-                dim.definition_point = v3(elbow);
-                dim.base.definition_point = v3(elbow);
-                CmdResult::CommitAndExit(self.plane.place_entity(EntityType::Dimension(
-                    Dimension::Ordinate(dim),
-                )))
+                crate::entities::dimension::set_dimension_text_override(
+                    &mut dim.base,
+                    self.text_override.clone(),
+                );
+                if let Some(angle) = self.text_angle {
+                    dim.base.text_rotation = angle;
+                }
+                dim.refresh_measurement();
+                CmdResult::CommitDimension {
+                    entity: self.plane.place_entity(EntityType::Dimension(
+                        Dimension::Ordinate(dim),
+                    )),
+                    source: None,
+                }
             }
         }
     }
 
     fn on_enter(&mut self) -> CmdResult {
+        if self.awaiting_text {
+            self.awaiting_text = false;
+            return CmdResult::NeedPoint;
+        }
+        if self.awaiting_angle {
+            self.awaiting_angle = false;
+            return CmdResult::NeedPoint;
+        }
         CmdResult::Cancel
     }
+
+    fn wants_text_input(&self) -> bool {
+        true
+    }
+
+    fn point_step_accepts_keywords(&self) -> bool {
+        !self.awaiting_text && !self.awaiting_angle
+    }
+
+    fn wants_text_with_spaces(&self) -> bool {
+        self.awaiting_text
+    }
+
+    fn on_text_input(&mut self, text: &str) -> Option<CmdResult> {
+        if self.awaiting_text {
+            let value = text.trim();
+            self.text_override = if value.is_empty() || value == "<>" {
+                None
+            } else {
+                Some(value.to_string())
+            };
+            self.awaiting_text = false;
+            return Some(CmdResult::NeedPoint);
+        }
+        if self.awaiting_angle {
+            let value = text.trim();
+            self.text_angle = if value.is_empty() {
+                None
+            } else {
+                crate::entities::common::parse_typed_angle(value)
+            };
+            self.awaiting_angle = false;
+            return Some(CmdResult::NeedPoint);
+        }
+        if !matches!(self.step, Step::LeaderEndpoint { .. }) {
+            return None;
+        }
+        match text.trim().to_uppercase().as_str() {
+            "X" | "XDATUM" => {
+                self.datum_mode = DatumMode::X;
+                Some(CmdResult::NeedPoint)
+            }
+            "Y" | "YDATUM" => {
+                self.datum_mode = DatumMode::Y;
+                Some(CmdResult::NeedPoint)
+            }
+            "T" | "TEXT" => {
+                self.mtext_override = false;
+                self.awaiting_text = true;
+                Some(CmdResult::NeedPoint)
+            }
+            "M" | "MTEXT" => {
+                self.mtext_override = true;
+                self.awaiting_text = true;
+                Some(CmdResult::NeedPoint)
+            }
+            "A" | "ANGLE" => {
+                self.awaiting_angle = true;
+                Some(CmdResult::NeedPoint)
+            }
+            _ => None,
+        }
+    }
+
     fn on_mouse_move(&mut self, pt: DVec3) -> Option<WireModel> {
         let feature = match self.step {
             Step::LeaderEndpoint { feature } => feature,
@@ -98,17 +210,24 @@ impl CadCommand for OrdinateDimCommand {
         };
         let feature = self.plane.to_local(feature);
         let pt = self.plane.to_local(pt);
-        let is_x = is_x_type(feature, pt);
-        let elbow = ordinate_elbow(feature, pt, is_x);
-        let feature = self.plane.to_world(feature);
-        let elbow = self.plane.to_world(elbow);
-        let pt = self.plane.to_world(pt);
+        let is_x = match self.datum_mode {
+            DatumMode::Automatic => is_x_type(feature, pt),
+            DatumMode::X => true,
+            DatumMode::Y => false,
+        };
+        let dim = DimensionOrdinate::new(v3(feature), v3(pt), is_x);
+        let points = dim.leader_polyline(0.44, 0.0, None);
         // Screen-only rubber band: downcast to f32 at the preview boundary.
-        Some(preview_wire(vec![
-            feature.as_vec3(),
-            elbow.as_vec3(),
-            pt.as_vec3(),
-        ]))
+        Some(preview_wire(
+            points
+                .into_iter()
+                .map(|point| {
+                    self.plane
+                        .to_world(DVec3::new(point.x, point.y, point.z))
+                        .as_vec3()
+                })
+                .collect(),
+        ))
     }
 }
 
@@ -122,17 +241,7 @@ fn v3(p: DVec3) -> Vector3 {
 fn is_x_type(feature: DVec3, leader: DVec3) -> bool {
     let dx = (leader.x - feature.x).abs();
     let dy = (leader.y - feature.y).abs();
-    dy >= dx
-}
-
-/// Orthogonal elbow of the ordinate leader: an X-datum runs along Y from the
-/// feature then jogs across in X; a Y-datum runs along X then jogs in Y.
-fn ordinate_elbow(feature: DVec3, leader: DVec3, is_x: bool) -> DVec3 {
-    if is_x {
-        DVec3::new(feature.x, leader.y, feature.z)
-    } else {
-        DVec3::new(leader.x, feature.y, feature.z)
-    }
+    dy > dx
 }
 
 fn preview_wire(points: Vec<Vec3>) -> WireModel {
diff --git a/src/modules/draw/modify/explode.rs b/src/modules/draw/modify/explode.rs
index 302033f9..88a6c197 100644
--- a/src/modules/draw/modify/explode.rs
+++ b/src/modules/draw/modify/explode.rs
@@ -851,7 +851,20 @@ fn explode_dimension(dim: &Dimension, doc: &CadDocument) -> Vec<EntityType> {
     // Per-element commons so a baked block keeps the style's colours/lineweights:
     // extension lines (DIMCLRE/DIMLWE), dimension line + arrows + centre mark
     // (DIMCLRD/DIMLWD), text (DIMCLRT).
-    let ext_c = dim_common(&base.common, met.dimclre, met.dimlwe);
+    let mut ext_c = dim_common(&base.common, met.dimclre, met.dimlwe);
+    let override_data = &base.common.extended_data;
+    if let Some(color) = crate::entities::dim_override::color(
+        override_data,
+        crate::entities::dim_override::DIMCLRE,
+    ) {
+        ext_c.color = color;
+    }
+    if let Some(lineweight) = crate::entities::dim_override::int(
+        override_data,
+        crate::entities::dim_override::DIMLWE,
+    ) {
+        ext_c.line_weight = acadrust::types::LineWeight::from_value(lineweight);
+    }
     let dim_c = dim_common(&base.common, met.dimclrd, met.dimlwd);
     let mut result: Vec<EntityType> = Vec::new();
 
@@ -1041,8 +1054,33 @@ fn explode_dimension(dim: &Dimension, doc: &CadDocument) -> Vec<EntityType> {
             ));
         }
         Dimension::Ordinate(d) => {
-            result.push(make_seg(&d.feature_location, &d.definition_point, &dim_c));
-            result.push(make_seg(&d.definition_point, &d.leader_endpoint, &dim_c));
+            if !met.dimse1 {
+                use crate::entities::dim_override as ov;
+                let scale = ov::real(override_data, ov::DIMSCALE)
+                    .filter(|value| *value > 1e-6)
+                    .unwrap_or(1.0);
+                let dogleg = ov::real(override_data, ov::DIMASZ)
+                    .unwrap_or(met.dimasz / scale)
+                    * scale
+                    * 2.0;
+                let offset = ov::real(override_data, ov::DIMEXO)
+                    .unwrap_or(met.dimexo / scale)
+                    * scale;
+                let fixed_on = ov::int(override_data, ov::DIMFXLON)
+                    .map(|value| value != 0)
+                    .unwrap_or(met.dimfxlon);
+                let fixed_length = fixed_on.then(|| {
+                    ov::real(override_data, ov::DIMFXL)
+                        .unwrap_or(met.dimfxl / scale)
+                        * scale
+                });
+                let points = d.leader_polyline(dogleg, offset, fixed_length);
+                for pair in points.windows(2) {
+                    if (pair[1] - pair[0]).length() > 1e-12 {
+                        result.push(make_seg(&pair[0], &pair[1], &ext_c));
+                    }
+                }
+            }
         }
         Dimension::Arc(d) => {
             result.extend(angular_block_segs(
diff --git a/src/scene/dimension_assoc.rs b/src/scene/dimension_assoc.rs
index 2814695e..147b20eb 100644
--- a/src/scene/dimension_assoc.rs
+++ b/src/scene/dimension_assoc.rs
@@ -115,10 +115,11 @@ fn resolve_reference(scene: &Scene, reference: &AssocDimensionReference) -> Opti
         .copied()
 }
 
-fn dimension_points(dimension: &Dimension) -> Option<[Vector3; 2]> {
+fn dimension_points(dimension: &Dimension) -> Option<[Option<Vector3>; 2]> {
     match dimension {
-        Dimension::Linear(linear) => Some([linear.first_point, linear.second_point]),
-        Dimension::Aligned(aligned) => Some([aligned.first_point, aligned.second_point]),
+        Dimension::Linear(linear) => Some([Some(linear.first_point), Some(linear.second_point)]),
+        Dimension::Aligned(aligned) => Some([Some(aligned.first_point), Some(aligned.second_point)]),
+        Dimension::Ordinate(ordinate) => Some([Some(ordinate.feature_location), None]),
         _ => None,
     }
 }
@@ -186,13 +187,14 @@ impl Scene {
             return;
         };
         let resolved: [Option<(Handle, i32, f64, u8)>; 2] = std::array::from_fn(|index| {
+            let point = source_data[index]?;
             let source = sources[index]?;
             let entity = self.document.get_entity(source)?;
-            source_marker(entity, source_data[index]).map(|marker| {
+            source_marker(entity, point).map(|marker| {
                 (
                     source,
                     marker,
-                    source_parameter(entity, source_data[index]),
+                    source_parameter(entity, point),
                     if matches!(entity, EntityType::Circle(_)) {
                         10
                     } else {
@@ -230,7 +232,7 @@ impl Scene {
                     marker,
                     parameter,
                     osnap_type,
-                    source_data[index],
+                    source_data[index].expect("resolved dimension point"),
                 ));
             }
         }
@@ -274,7 +276,7 @@ impl Scene {
             return [None, None];
         };
         points.map(|point| {
-            self.document
+            point.and_then(|point| self.document
                 .entities()
                 .filter(|entity| entity.common().handle != dimension)
                 .filter_map(|entity| {
@@ -283,7 +285,7 @@ impl Scene {
                 })
                 .filter(|(distance, _)| *distance <= 1e-16)
                 .min_by(|first, second| first.0.total_cmp(&second.0))
-                .map(|(_, handle)| handle)
+                .map(|(_, handle)| handle))
         })
     }
 
@@ -353,6 +355,12 @@ impl Scene {
                     aligned.base.actual_measurement = aligned.measurement();
                     aligned.base.definition_point = aligned.definition_point;
                 }
+                Dimension::Ordinate(ordinate) => {
+                    if let Some(feature) = first {
+                        ordinate.feature_location = feature;
+                    }
+                    ordinate.refresh_measurement();
+                }
                 _ => continue,
             }
             refreshed.push((association.dimension, ChangeKind::Modified));