Boundary Trim

Keep or remove sketch geometry based on a selected closed boundary and an inside or outside press.

Purpose

Keep or remove sketch geometry based on a selected closed boundary and an inside or outside press.

While editing a sketch, open Modify and choose Boundary Trim.

Select one closed boundary, then press inside or outside it to choose the retained region.

The pressed side determines which portions are kept and which crossing geometry is removed.

Intersecting sketch geometry is split and trimmed relative to the chosen boundary.

Undo to restore the original geometry or repair individual results with Trim, Extend, and drawing tools.

The boundary is not accepted.

Use a closed non-self-intersecting loop with coincident endpoints and no construction-only boundary pieces.