# BACKZ System Variable [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [System Variables](Help%20System/GSTARCAD/2020/System%20Variables/(System%20Variables).md) → [B](Help%20System/GSTARCAD/2020/System%20Variables/B/(B).md) **Function Description:** The BACKZ system variable is used to set the offset value from clipping plane to target plane when saving current viewports by drawing units. (Read-Only) | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 0.0000 | --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/B/BACKZ%20System%20Variable--5476ab858358.md) · [GstarCAD 2017](../../../2017/System%20Variables/B/BACKZ%20System%20Variable--5476ab858358.md) · [GstarCAD 2018](../../../2018/System%20Variables/B/BACKZ%20System%20Variable--5476ab858358.md) · [GstarCAD 2019](../../../2019/System%20Variables/B/BACKZ%20System%20Variable--5476ab858358.md) · [GstarCAD 2021](../../../2021/System%20Variables/B/BACKZ%20System%20Variable--5476ab858358.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/B/BACKZ%20System%20Variable--5476ab858358.md)