# TRIMMODE System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) **Function Description:** The TRIMMODE system variable is used to control whether to trim selected edges for fillet and chamfer. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** **0:** do not trim selected edges **1:** trim the selected edge to endpoints of chamfer lines and fillet arcs --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/TRIMMODE.html) · © Gstarsoft Co., Ltd.