diff --git a/notes.md b/notes.md
index 9973fa1e..a9bc6529 100644
--- a/notes.md
+++ b/notes.md
@@ -63,6 +63,7 @@
 
 # CAM
 
+* `B` prevent z delta cuts when not contouring
 * `B` climb vs conventional not fully consistent after refactor
 * `B` outside cutting direction in roughing mode inverted
 * `B` clear voids has double interior pass because wrong offset shadow used
diff --git a/src/mode/cam/prepare.js b/src/mode/cam/prepare.js
index 2fab8ed9..0c5bbda2 100644
--- a/src/mode/cam/prepare.js
+++ b/src/mode/cam/prepare.js
@@ -240,6 +240,7 @@
             }
 
             // convert short planar moves to cuts
+            // TODO delta Z cuts should only be active in contouring
             if (isMove && deltaXY <= toolDiamMove) {
                  if (absDeltaZ <= tolerance) {
                     cut = 1;