# ROLLOVEROPACITY System Variable [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) → [R](Help%20System/GSTARCAD/2021/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--24a0701280ee.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable--24a0701280ee.md) · [GstarCAD 2018](../../../2018/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable--24a0701280ee.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable--24a0701280ee.md) · [GstarCAD 2020](../../../2020/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable--24a0701280ee.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable--24a0701280ee.md)