# DIMDEC 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 DIMDEC system variable is used to set the number of decimal places in main units for dimensions. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 4 (Imperial) or 2 (Metric) | The precious is based on selected units or angle formats. The specified value will be applied on angular dimension when the DIMDEC system variable set to be -1. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables_Dgsv/DIMDEC.html) · © Gstarsoft Co., Ltd.