From FreeCAD Documentation
- There are several ways to invoke the tool:
- Press the
Create external geometry button.
- Select the Sketcher → Sketcher tools →
Create external geometry option from the menu.
- Right-click in the 3D view and select the
Create external geometry option from the context menu.
- Use the keyboard shortcut: G then X.
- The cursor changes to a cross with the tool icon.
- Select an external edge or a vertex. See Notes.
- External geometry is created.
- This tool always runs in continue mode: optionally keep selecting external edges and/or a vertices.
- To finish, right-click or press Esc, or start another geometry or constraint creation tool.