# UCSXDIR System Variable [GstarCAD 2018](Help%20System/GSTARCAD/2018/Index.md) → [System Variables](Help%20System/GSTARCAD/2018/System%20Variables/(System%20Variables).md) → [U](Help%20System/GSTARCAD/2018/System%20Variables/U/(U).md) ## Function Description: The UCSXDIR system variable is used to store the X direction of current UCS in current viewport of current space. (Read-Only) | | | | --- | --- | | Type | 3D point | | Saved in | Drawing | | Initial value | 0.0000,1.0000,0.0000 | The X direction of UCS could be different for each viewport. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/U/UCSXDIR%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/U/UCSXDIR%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/U/UCSXDIR%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/U/UCSXDIR%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/U/UCSXDIR%20System%20Variable.md)