# SELECTIONAREAOPACITY System Variable [GstarCAD 2017](Help%20System/GSTARCAD/2017/Index.md) → [System Variables](Help%20System/GSTARCAD/2017/System%20Variables/(System%20Variables).md) → [S](Help%20System/GSTARCAD/2017/System%20Variables/S/(S).md) **Function Description:** The SELECTIONAREAOPACITY system variable is used to control the opacity of selection area in window selection and crossing selection. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 25 | | Range | 0 \~ 100 | The smaller of the opacity value, the more transparent of selection area. If specified it to be 100, the selection area become completely opaque. To view the effect, the SELECTIONAREA system variable must be turned on. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/S/SELECTIONAREAOPACITY%20System%20Variable--3dfce2a37a1e.md) · [GstarCAD 2018](../../../2018/System%20Variables/S/SELECTIONAREAOPACITY%20System%20Variable--3dfce2a37a1e.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/S/SELECTIONAREAOPACITY%20System%20Variable--3dfce2a37a1e.md) · [GstarCAD 2020](../../../2020/System%20Variables/S/SELECTIONAREAOPACITY%20System%20Variable--3dfce2a37a1e.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/S/SELECTIONAREAOPACITY%20System%20Variable--3dfce2a37a1e.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/S/SELECTIONAREAOPACITY%20System%20Variable--3dfce2a37a1e.md)