# System variable with I letter [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [System Variables](Help%20System/GSTARCAD/2020/System%20Variables/(System%20Variables).md) → [I](Help%20System/GSTARCAD/2020/System%20Variables/I/(I).md) - [IMAGEFRAME](Help%20System/GSTARCAD/2020/System%20Variables/I/IMAGEFRAME%20System%20Variable.md "IMAGEFRAME") - [IMAGEHLT](Help%20System/GSTARCAD/2020/System%20Variables/I/IMAGEHLT%20System%20Variable.md "IMAGEHLT") - [IMPLIEDFACE](Help%20System/GSTARCAD/2020/System%20Variables/I/IMPLIEDFACE%20System%20Variable.md "IMPLIEDFACE") - [INDEXCTL](Help%20System/GSTARCAD/2020/System%20Variables/I/INDEXCTL%20System%20Variable.md "INDEXCTL") - [INETLOCATION](Help%20System/GSTARCAD/2020/System%20Variables/I/INETLOCATION%20System%20Variable.md "INETLOCATION") - [INPUTHISTORYMODE](Help%20System/GSTARCAD/2020/System%20Variables/I/INPUTHISTORYMODE%20System%20Variable.md "INPUTHISTORYMODE") - [INSBASE](Help%20System/GSTARCAD/2020/System%20Variables/I/INSBASE%20System%20Variable.md "INSBASE") - [INSNAME](Help%20System/GSTARCAD/2020/System%20Variables/I/INSNAME%20System%20Variable.md "INSNAME ") - [INSUNITS](Help%20System/GSTARCAD/2020/System%20Variables/I/INSUNITS%20System%20Variable.md "INSUNITS") - [INSUNITSDEFSOURCE](Help%20System/GSTARCAD/2020/System%20Variables/I/INSUNITSDEFSOURCE%20System%20Variable.md "INSUNITSDEFSOURCE") - [INSUNITSDEFTARGET](Help%20System/GSTARCAD/2020/System%20Variables/I/INSUNITSDEFTARGET%20System%20Variable.md "INSUNITSDEFTARGET") - [INTERFERECOLOR](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md "INTERFERECOLOR") - [INTERFEREOBJVS](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERFEREOBJVS%20System%20Variable.md "INTERFEREOBJVS ") - [INTERFEREVPVS](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md "INTERFEREVPVS ") - [INTERSECTIONCOLOR](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERSECTIONCOLOR%20System%20Variable.md "INTERSECTIONCOLOR ") - [INTERSECTIONDISPLAY](Help%20System/GSTARCAD/2020/System%20Variables/I/INTERSECTIONDISPLAY%20System%20Variable.md "INTERSECTIONDISPLAY ") - [ISAVEBAK](Help%20System/GSTARCAD/2020/System%20Variables/I/ISAVEBAK%20System%20Variable.md "ISAVEBAK ") - [ISAVEPERCENT](Help%20System/GSTARCAD/2020/System%20Variables/I/ISAVEPERCENT%20System%20Variable.md "ISAVEPERCENT ") - [ISOLINES](Help%20System/GSTARCAD/2020/System%20Variables/I/ISOLINES%20System%20Variable.md "ISOLINES") ---