# ROLLOVEROPACITY System Variable [GstarCAD 2018](Help%20System/GSTARCAD/2018/Index.md) → [System Variables](Help%20System/GSTARCAD/2018/System%20Variables/(System%20Variables).md) → [R](Help%20System/GSTARCAD/2018/System%20Variables/R/(R).md) ## Function Description: The ROLLOVEROPACITY system variable is used to control the palettes opacity when cursor moving to it. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 100 | | Range | 0 \~ 100 | ## System Variable Value: **0:** completely transparency **1:** completely opaque This system variable determines the default setting in the Transparency dialog box \> Rollover section \> How transparent should the palette be on mouse hover? option. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md)