# DIMSAH System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) → [D](Help%20System/GSTARCAD/2027/System%20Variables/D/(D).md) ## Function Description: The DIMSAH system variable is used to control the display of arrowhead block in dimension line. | | | | --- | --- | | Type | Parameter | | Saved in | Drawing | | Initial value | Off | ## System Variable Value: **off:** use the arrowhead block set by DIMBLK system variable **on:** use the arrowhead block set by DIMBLK1 and DIMBLK2 system variable --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables_Dgsv/DIMSAH.html) · © Gstarsoft Co., Ltd.