# C [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) ## Topics - [CALCINPUT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CALCINPUT%20System%20Variable.md) - [CAMERADISPLAY System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CAMERADISPLAY%20System%20Variable.md) - [CAMERAHEIGHT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CAMERAHEIGHT%20System%20Variable.md) - [CANNOSCALE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CANNOSCALE%20System%20Variable.md) - [CANNOSCALEVALUE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CANNOSCALEVALUE%20System%20Variable.md) - [CAPTURETHUMBNAILS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CAPTURETHUMBNAILS%20System%20Variable.md) - [CBARTRANSPARENCY System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CBARTRANSPARENCY%20System%20Variable.md) - [CCONSTRAINTFORM System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CCONSTRAINTFORM%20System%20Variable.md) - [CDATE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CDATE%20System%20Variable.md) - [CECOLOR System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CECOLOR%20System%20Variable.md) - [CELTSCALE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CELTSCALE%20System%20Variable.md) - [CELTYPE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CELTYPE%20System%20Variable.md) - [CELWEIGHT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CELWEIGHT%20System%20Variable.md) - [CENTERMT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CENTERMT%20System%20Variable.md) - [CETRANSPARENCY System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CETRANSPARENCY%20System%20Variable.md) - [CHAMFERA System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CHAMFERA%20System%20Variable.md) - [CHAMFERB System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CHAMFERB%20System%20Variable.md) - [CHAMFERC System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CHAMFERC%20System%20Variable.md) - [CHAMFERD System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CHAMFERD%20System%20Variable.md) - [CHAMMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CHAMMODE%20System%20Variable.md) - [CIRCLERAD System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CIRCLERAD%20System%20Variable.md) - [CLASSICKEYS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CLASSICKEYS%20System%20Variable.md) - [CLAYER System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CLAYER%20System%20Variable.md) - [CLEANSCREENSTATE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CLEANSCREENSTATE%20System%20Variable.md) - [CLISTATE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CLISTATE%20System%20Variable.md) - [CMATERIAL System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMATERIAL%20System%20Variable.md) - [CMDACTIVE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMDACTIVE.md) - [CMDDIA System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMDDIA%20System%20Variable.md) - [CMDECHO System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMDECHO%20System%20Variable.md) - [CMDINPUTHISTORYMAX System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMDINPUTHISTORYMAX%20System%20Variable.md) - [CMDNAMES System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMDNAMES%20System%20Variable.md) - [CMLEADERSTYLE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMLEADERSTYLE%20System%20Variable.md) - [CMLJUST System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMLJUST%20System%20Variable.md) - [CMLSCALE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMLSCALE%20System%20Variable.md) - [CMLSTYLE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CMLSTYLE%20System%20Variable.md) - [COMPASS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/COMPASS%20System%20Variable.md) - [CONSTRAINTBARDISPLAY System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CONSTRAINTBARDISPLAY%20System%20Variable.md) - [CONSTRAINTBARMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CONSTRAINTBARMODE%20System%20Variable.md) - [CONSTRAINTINFER System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CONSTRAINTINFER%20System%20Variable.md) - [CONSTRAINTNAMEFORMAT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CONSTRAINTNAMEFORMAT%20System%20Variable.md) - [CONSTRAINTSOLVEMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CONSTRAINTSOLVEMODE%20System%20Variable.md) - [COORDS System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/COORDS%20System%20Variable.md) - [COPYMODE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/COPYMODE%20System%20Variable.md) - [CPLOTSTYLE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CPLOTSTYLE%20System%20Variable.md) - [CPROFILE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CPROFILE%20System%20Variable.md) - [CROSSINGAREACOLOR System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CROSSINGAREACOLOR%20System%20Variable.md) - [CSHADOW System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CSHADOW%20System%20Variable.md) - [CTAB System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CTAB%20System%20Variable.md) - [CTABLESTYLE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CTABLESTYLE%20System%20Variable.md) - [CULLINGOBJ System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CULLINGOBJ%20System%20Variable.md) - [CULLINGOBJSELECTION System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CULLINGOBJSELECTION%20System%20Variable.md) - [CURSORSIZE System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CURSORSIZE%20System%20Variable.md) - [CVPORT System Variable](Help%20System/GSTARCAD/2021/System%20Variables/C/CVPORT%20System%20Variable.md) - [System variable with C letter](Help%20System/GSTARCAD/2021/System%20Variables/C/System%20variable%20with%20C%20letter.md)