# REBUILD2DOPTION System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) **Function Description:** The REBUILD2DOPTION system variable is used to control whether to delete original curves when rebuilding splines. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** **0:** keep original curves **1:** delete original curves --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/REBUILD2DOPTION.html) · © Gstarsoft Co., Ltd.