# System variable with I letter [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) - [IMAGEFRAME](Help%20System/GSTARCAD/2021/System%20Variables/I/IMAGEFRAME%20System%20Variable--86b17de78762.md "IMAGEFRAME") - [IMAGEHLT](Help%20System/GSTARCAD/2021/System%20Variables/I/IMAGEHLT%20System%20Variable--aea365deaa03.md "IMAGEHLT") - [IMPLIEDFACE](Help%20System/GSTARCAD/2021/System%20Variables/I/IMPLIEDFACE%20System%20Variable--385170c58738.md "IMPLIEDFACE") - [INDEXCTL](Help%20System/GSTARCAD/2021/System%20Variables/I/INDEXCTL%20System%20Variable--79569c6ca87c.md "INDEXCTL") - [INETLOCATION](Help%20System/GSTARCAD/2021/System%20Variables/I/INETLOCATION%20System%20Variable--bcc877cbef7c.md "INETLOCATION") - [INPUTHISTORYMODE](Help%20System/GSTARCAD/2021/System%20Variables/I/INPUTHISTORYMODE%20System%20Variable--742683b63f9b.md "INPUTHISTORYMODE") - [INSBASE](Help%20System/GSTARCAD/2021/System%20Variables/I/INSBASE%20System%20Variable--b98261889450.md "INSBASE") - [INSNAME](Help%20System/GSTARCAD/2021/System%20Variables/I/INSNAME%20System%20Variable--a3624314c370.md "INSNAME ") - [INSUNITS](Help%20System/GSTARCAD/2021/System%20Variables/I/INSUNITS%20System%20Variable--d0a12315c0c1.md "INSUNITS") - [INSUNITSDEFSOURCE](Help%20System/GSTARCAD/2021/System%20Variables/I/INSUNITSDEFSOURCE%20System%20Variable--e0f5053f4107.md "INSUNITSDEFSOURCE") - [INSUNITSDEFTARGET](Help%20System/GSTARCAD/2021/System%20Variables/I/INSUNITSDEFTARGET%20System%20Variable--3fb4951541de.md "INSUNITSDEFTARGET") - [INTERFERECOLOR](Help%20System/GSTARCAD/2021/System%20Variables/I/INTERFERECOLOR%20System%20Variable--42037c88d5a6.md "INTERFERECOLOR") - [INTERFEREOBJVS](Help%20System/GSTARCAD/2021/System%20Variables/I/INTERFEREOBJVS%20System%20Variable--a23b993f164a.md "INTERFEREOBJVS ") - [INTERFEREVPVS](Help%20System/GSTARCAD/2021/System%20Variables/I/INTERFEREVPVS%20System%20Variable--e2e0663a582a.md "INTERFEREVPVS ") - [INTERSECTIONCOLOR](Help%20System/GSTARCAD/2021/System%20Variables/I/INTERSECTIONCOLOR%20System%20Variable--527c7d7ec5e8.md "INTERSECTIONCOLOR ") - [INTERSECTIONDISPLAY](Help%20System/GSTARCAD/2021/System%20Variables/I/INTERSECTIONDISPLAY%20System%20Variable--76f70b9f350d.md "INTERSECTIONDISPLAY ") - [ISAVEBAK](Help%20System/GSTARCAD/2021/System%20Variables/I/ISAVEBAK%20System%20Variable--385d02197980.md "ISAVEBAK ") - [ISAVEPERCENT](Help%20System/GSTARCAD/2021/System%20Variables/I/ISAVEPERCENT%20System%20Variable--b5d64a4bc3a5.md "ISAVEPERCENT ") - [ISOLINES](Help%20System/GSTARCAD/2021/System%20Variables/I/ISOLINES%20System%20Variable--f5df8da81546.md "ISOLINES") ---