# ZOOMWHEEL System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) **Function Description:** The ZOOMWHEEL system variable is used to switch the transparently zoom direction when scrolling the middle mouse wheel. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 0 | | Range | 0,1 | **System Variable Value:** **0:** move wheel forward to zoom in; move wheel backwards to zoom out **1:** move wheel forward to zoom out; move wheel backwards to zoom in --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables/ZOOMWHEEL.html) · © Gstarsoft Co., Ltd.