# I [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) ## Topics - **IMAGEFRAME System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/IMAGEFRAME%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/IMAGEFRAME%20System%20Variable.md) - **IMAGEHLT System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/IMAGEHLT%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/IMAGEHLT%20System%20Variable.md) - **IMPLIEDFACE System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/IMPLIEDFACE%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/IMPLIEDFACE%20System%20Variable.md) - **INDEXCTL System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INDEXCTL%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INDEXCTL%20System%20Variable.md) - **INETLOCATION System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INETLOCATION%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INETLOCATION%20System%20Variable.md) - [INPUTAUTOSWITCH System Variable](Help%20System/GSTARCAD/2027/System%20Variables/I/INPUTAUTOSWITCH%20System%20Variable.md) - **INPUTHISTORYMODE System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INPUTHISTORYMODE%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INPUTHISTORYMODE%20System%20Variable.md) - [INPUTSEARCHDELAY System Variable](INPUTSEARCHDELAY%20System%20Variable.md) - [INPUTSEARCHOPTIONFLAGS System Variable](INPUTSEARCHOPTIONFLAGS%20System%20Variable.md) - [INSBASE System Variable](Help%20System/GSTARCAD/2027/System%20Variables/I/INSBASE%20System%20Variable.md) - **INSNAME System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INSNAME%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INSNAME%20System%20Variable.md) - **INSUNITS System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INSUNITS%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INSUNITS%20System%20Variable.md) - **INSUNITSDEFSOURCE System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INSUNITSDEFSOURCE%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INSUNITSDEFSOURCE%20System%20Variable.md) - **INSUNITSDEFTARGET System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INSUNITSDEFTARGET%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INSUNITSDEFTARGET%20System%20Variable.md) - **INTERFERECOLOR System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERFERECOLOR%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERFERECOLOR%20System%20Variable.md) - **INTERFEREOBJVS System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERFEREOBJVS%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERFEREOBJVS%20System%20Variable.md) - **INTERFEREVPVS System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERFEREVPVS%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERFEREVPVS%20System%20Variable.md) - **INTERSECTIONCOLOR System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERSECTIONCOLOR%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERSECTIONCOLOR%20System%20Variable.md) - **INTERSECTIONDISPLAY System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERSECTIONDISPLAY%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/INTERSECTIONDISPLAY%20System%20Variable.md) - **ISAVEBAK System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/ISAVEBAK%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/ISAVEBAK%20System%20Variable.md) - **ISAVEPERCENT System Variable** — [General reference](Help%20System/GSTARCAD/2027/System%20Variables/ISAVEPERCENT%20System%20Variable.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/System%20Variables/ISAVEPERCENT%20System%20Variable.md) - [ISOLINES System Variable](Help%20System/GSTARCAD/2027/System%20Variables/I/ISOLINES%20System%20Variable.md) [Original category](https://www.gstarcad.net/help/GstarCAD_2027_en-US/menu/systemVariables_Igsv.html)