diff --git a/src/mesh/api.js b/src/mesh/api.js
index d0ed8f31..28378e5a 100644
--- a/src/mesh/api.js
+++ b/src/mesh/api.js
@@ -522,6 +522,30 @@ let sketch = {
             });
         },
 
+        rotate() {
+            function doit(sketch, items, angle) {
+                items.filter(i => i.type === 'polygon').forEach(item => {
+                    Object.assign(item, newPolygon().fromObject(item).rotate(-angle).toObject());
+                });
+                sketch.render();
+            }
+            sketch.selection.ifcan((sketch, items) => {
+                api.modal.dialog({
+                    title: "rotate",
+                    body: [ h.div({ class: "addgear" }, [
+                        h.label('angle'),
+                        h.input({ value: 90, size: 5, id: "_angle" }),
+                        h.button({ _: "rotate", onclick() {
+                            const { _angle } = api.modal.bound;
+                            doit(sketch, items, parseFloat(_angle.value));
+                            api.modal.hide();
+                        } })
+                    ]) ]
+                });
+                api.modal.bound._angle.focus();
+            });
+        },
+
         down() {
             sketch.selection.ifcan((sketch, items) => {
                 items.forEach(item => sketch.arrange.down(item));
diff --git a/src/mesh/build.js b/src/mesh/build.js
index bb3b103d..02887b4e 100644
--- a/src/mesh/build.js
+++ b/src/mesh/build.js
@@ -448,6 +448,7 @@ function ui_build() {
                 menu_item('Ungroup', sketch.arrange.ungroup),
                 hr(),
                 menu_item('Center', sketch.arrange.center),
+                menu_item('Rotate', sketch.arrange.rotate),
                 hr(),
                 menu_item('Flip Horizontal', sketch.arrange.fliph),
                 menu_item('Flip Vertical', sketch.arrange.flipv),
@@ -565,13 +566,16 @@ function ui_build() {
         tool_item('bi-plus', 'New Sketch', add.sketch),
         tool_item('bi-circle', 'Add Circle', api.add.circle),
         tool_item('bi-square', 'Add Rectangle', api.add.rectangle),
+        tool_item('bi-symmetry-vertical', 'Offset', api.sketch.arrange.fliph),
+        tool_item('bi-symmetry-horizontal', 'Offset', api.sketch.arrange.flipv),
+        tool_item('bi-arrow-clockwise', 'Offset', api.sketch.arrange.rotate),
         tool_item('bi-union', 'Union', sketch.boolean.union),
         tool_item('bi-intersect', 'Intersect', sketch.boolean.intersect),
         tool_item('bi-exclude', 'Difference', sketch.boolean.difference),
         tool_item('bi-pip', 'Nest', sketch.boolean.nest),
         tool_item('bi-layers', 'Flatten', sketch.boolean.flatten),
         tool_item('bi-cookie', 'Even Odd', sketch.boolean.evenodd),
-        tool_item('bi-badge-3d', 'Extrude', () => sketch.extrude()),
+        tool_item('bi-arrow-bar-up', 'Extrude', () => sketch.extrude()),
 ]));
 
     // bind object chiclets