Polygon wall editing

What Shift+E does#

Select a wall and press Shift+E to enter wall vertex edit mode. For a normal wall, the handles represent the construction centerline. For a historical or custom polygon wall, the handles represent the stored boundary rings.

How to edit vertices#

1. Select the wall.
2. Press Shift+E.
3. Drag a handle to move one vertex.
4. Shift+click extra handles to move several vertices together.
5. Use Enter to save or Escape to cancel.

Selecting multiple vertices#

• Shift+click adds a handle to the current selection.
• Ctrl+drag in empty space draws a selection rectangle around handles.
• Dragging a selected handle moves the whole selection.
• Shift+drag constrains the move to the dominant axis.

Alignment menu#

Right-click a handle to open the alignment menu. It can align selected vertices on X, on Y, on both coordinates or along a typed angle. When at least two vertices are selected, the menu also offers width and height inputs for the selected span.

Dimensions with D#

When at least two vertices are selected, press D to open the dimensions modal. OhmCAD scales the selected vertex coordinates to the entered width and height and validates the wall geometry. For boundary vertices this can change a wall section's thickness. For centerline vertices it changes the path span, not the configured wall thickness.

Add and remove vertices#

• Shift+click on an edge in edit mode inserts a vertex near the pointer.
• Delete or Backspace removes selected vertices when the wall ring remains valid.
• A three-point inner ring cannot lose one vertex, so OhmCAD removes that hole instead.

Save, continue or cancel#

• Enter saves the edited wall.
• E saves and continues into wall extension.
• Escape cancels and restores the original wall.

Limitations#

OhmCAD rejects edits that collapse a ring or create crossing wall edges. If the update cannot be saved, edit mode stays active so you can retry or cancel.