# DONUTID System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [D](Help%20System/GSTARCAD/2026/System%20Variables/D/(D).md) ## Function Description: The DONUTID system variable is used to set the default inside of diameter for donuts. | | | | --- | --- | | Type | Real | | Saved in | Not saved | | Initial value | 0.5000 | --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables_Dgsv/DONUTID.html) · © Gstarsoft Co., Ltd.