Create negative geometry (voids) to cut solid geometry with the Create Void tool.

- On the Create tab
Draw panel, select one of the drawing tools.
- Click in the drawing area, and draw a closed loop that intersects solid geometry.
- Select the closed loop.
- Click Modify | Lines tab
Form panel
Create Form drop-down
(Void Form). A void form extrusion is created.
- (Optional) Click Modify | Form Element tab
Form panel
(Solid Form) to convert this void to a solid.