# R [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) ## Topics - [RASTERDPI System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RASTERDPI%20System%20Variable.md) - [RASTERPERCENT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RASTERPERCENT%20System%20Variable.md) - [RASTERPREVIEW System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RASTERPREVIEW%20System%20Variable.md) - [RASTERTHRESHOLD System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RASTERTHRESHOLD%20System%20Variable.md) - [RE-INIT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RE-INIT%20System%20Variable.md) - [REBUILD2DCV System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILD2DCV%20System%20Variable.md) - [REBUILD2DDEGREE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILD2DDEGREE%20System%20Variable.md) - [REBUILD2DOPTION System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILD2DOPTION%20System%20Variable.md) - [REBUILDDEGREEU System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILDDEGREEU%20System%20Variable.md) - [REBUILDDEGREEV System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILDDEGREEV%20System%20Variable.md) - [REBUILDOPTIONS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILDOPTIONS%20System%20Variable.md) - [REBUILDU System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILDU%20System%20Variable.md) - [REBUILDV System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILDV%20System%20Variable.md) - [RECOVERAUTO System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RECOVERAUTO%20System%20Variable.md) - [RECOVERYMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RECOVERYMODE%20System%20Variable.md) - [REFEDITNAME System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REFEDITNAME%20System%20Variable.md) - [REGENMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REGENMODE%20System%20Variable.md) - [REMEMBERFOLDERS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REMEMBERFOLDERS%20System%20Variable.md) - [RENDERUSERLIGHTS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RENDERUSERLIGHTS%20System%20Variable.md) - [REPORTERROR System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/REPORTERROR%20System%20Variable.md) - [RIBBONCONTEXTSELLIM System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RIBBONCONTEXTSELLIM%20System%20Variable.md) - [RIBBONDOCKEDHEIGHT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RIBBONDOCKEDHEIGHT%20System%20Variable.md) - [RIBBONSELECTMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RIBBONSELECTMODE%20System%20Variable.md) - [ROAMABLEROOTPREFIX System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/ROAMABLEROOTPREFIX%20System%20Variable.md) - [ROLLOVEROPACITY System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/ROLLOVEROPACITY%20System%20Variable.md) - [ROLLOVERTIPS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/ROLLOVERTIPS%20System%20Variable.md) - [RTDISPLAY System Variable](Help%20System/GSTARCAD/2021/System%20Variables/R/RTDISPLAY%20System%20Variable.md) - [System variable with R letter](Help%20System/GSTARCAD/2021/System%20Variables/R/System%20variable%20with%20R%20letter.md)