# I [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) ## Topics - **IMAGEFRAME System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/IMAGEFRAME%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/IMAGEFRAME.md) - **IMAGEHLT System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/IMAGEHLT%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/IMAGEHLT.md) - **IMPLIEDFACE System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/IMPLIEDFACE%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/IMPLIEDFACE.md) - **INDEXCTL System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INDEXCTL%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INDEXCTL.md) - **INETLOCATION System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INETLOCATION%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INETLOCATION.md) - [INPUTAUTOSWITCH System Variable](Help%20System/GSTARCAD/2026/System%20Variables/I/INPUTAUTOSWITCH%20System%20Variable.md) - **INPUTHISTORYMODE System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INPUTHISTORYMODE%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INPUTHISTORYMODE.md) - [INSBASE System Variable](Help%20System/GSTARCAD/2026/System%20Variables/I/INSBASE%20System%20Variable.md) - **INSNAME System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INSNAME%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INSNAME.md) - **INSUNITS System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INSUNITS%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INSUNITS.md) - **INSUNITSDEFSOURCE System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INSUNITSDEFSOURCE%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INSUNITSDEFSOURCE.md) - **INSUNITSDEFTARGET System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INSUNITSDEFTARGET%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INSUNITSDEFTARGET.md) - **INTERFERECOLOR System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INTERFERECOLOR%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INTERFERECOLOR.md) - **INTERFEREOBJVS System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INTERFEREOBJVS%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INTERFEREOBJVS.md) - **INTERFEREVPVS System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INTERFEREVPVS%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INTERFEREVPVS.md) - **INTERSECTIONCOLOR System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INTERSECTIONCOLOR%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INTERSECTIONCOLOR.md) - **INTERSECTIONDISPLAY System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/INTERSECTIONDISPLAY%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/INTERSECTIONDISPLAY.md) - **ISAVEBAK System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/ISAVEBAK%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/ISAVEBAK.md) - **ISAVEPERCENT System Variable** — [Alphabetical reference](Help%20System/GSTARCAD/2026/System%20Variables/I/ISAVEPERCENT%20System%20Variable.md) · [General reference](Help%20System/GSTARCAD/2026/System%20Variables/ISAVEPERCENT.md) - [ISOLINES System Variable](Help%20System/GSTARCAD/2026/System%20Variables/I/ISOLINES%20System%20Variable.md) [Original category](https://www.gstarcad.net/help/GstarCAD_2026_en-US/menu/systemVariables_Igsv.html)