# DIMSD1 System Variable [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) → [D](Help%20System/GSTARCAD/2021/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.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/D/DIMSD1%20System%20Variable.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/System%20Variables/D/DIMSD1%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/D/DIMSD1%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/D/DIMSD1%20System%20Variable.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/D/DIMSD1%20System%20Variable.md)