# DIMSD1 System Variable [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [System Variables](Help%20System/GSTARCAD/2020/System%20Variables/(System%20Variables).md) → [D](Help%20System/GSTARCAD/2020/System%20Variables/D/(D).md) **Function Description:** The DIMSD1 system variable is used to control whether to hide the fist dimension line and arrowhead. | | | | --- | --- | | Type | Parameter | | Saved in | Drawing | | Initial value | Off | If this system variable set to on, it hides the extension line and arrowhead between the first extension line and text. **System Variable Value:** **Off:** display the first dimension line **On:** hide the first dimension line --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/D/DIMSD1%20System%20Variable--4a988201366b.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/D/DIMSD1%20System%20Variable--4a988201366b.md) · [GstarCAD 2018](../../../2018/System%20Variables/D/DIMSD1%20System%20Variable--4a988201366b.md) · [GstarCAD 2019](../../../2019/System%20Variables/D/DIMSD1%20System%20Variable--4a988201366b.md) · [GstarCAD 2021](../../../2021/System%20Variables/D/DIMSD1%20System%20Variable--4a988201366b.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/D/DIMSD1%20System%20Variable--4a988201366b.md)