# DIMTDEC 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 DIMTDEC system variable is used to set the number of decimal places displayed in tolerance values for primary units in a dimension. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 4(Imperial) or 2(Metric) | This system variable has no effect unless DIMTOL is set to On. The default for DIMTOL is Off. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables_Dgsv/DIMTDEC.html) · © Gstarsoft Co., Ltd.