# INTERFEREVPVS System Variable [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) → [I](Help%20System/GSTARCAD/2021/System%20Variables/I/(I).md) ## Function Description: The INTERFEREVPVS system variable is used to specify the visual style when checking interference objects. | | | | --- | --- | | Type | Strings | | Saved in | Drawing | | Initial value | Frame | The INTERFEREOBJVS system variable could only set the visual style to save in a drawing. Users could not use the PURGE command to delete the visual style specified by INTERFEREOBJVS system variable. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md)