Toolbar / Icon:
Menu: Modify > Round
Shortcut: R, N
Commands: round | rn


Rounds the corner of a contour. Optionally, the edge entities of the corner can be trimmed automatically to fit the new shape.


  1. Enter the radius of the rounding in the options tool bar (e.g. 5).
  2. Check "Trim" if you want to trim the entities automatically. If the option is disabled, the two corner entities will remain untouched.
  3. Choose the first edge entity (a line or arc).
  4. Choose the second entity.