# BACKZ System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [B](Help%20System/GSTARCAD/2026/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 | --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables_Bgsv/BACKZ.html) · © Gstarsoft Co., Ltd.