# O [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) ## Topics - **OBJECTSCALE Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OBJECTSCALE%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OBJECTSCALE%20Command.md) - [OCMP Command](Help%20System/GSTARCAD/2027/Commands/O/OCMP%20Command.md) - [OFFSET Command](Help%20System/GSTARCAD/2027/Commands/O/OFFSET%20Command.md) - **OLECONVERT Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OLECONVERT%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OLECONVERT%20Command.md) - **OLELINKS Command** — [General reference](OLELINKS%20Command%20%28General%20Reference%29.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OLELINKS%20Command.md) - **OLEOPEN Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OLEOPEN%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OLEOPEN%20Command.md) - **OLERESET Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OLERESET%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OLERESET%20Command.md) - **OLESCALE Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OLESCALE%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OLESCALE%20Command.md) - **OOPS Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OOPS%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OOPS%20Command.md) - **OPEN Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OPEN%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OPEN%20Command.md) - [OPEN3RD Command](Help%20System/GSTARCAD/2027/Commands/O/OPEN3RD%20Command.md) - **OPENSHEETSET Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OPENSHEETSET%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OPENSHEETSET%20Command.md) - **OPTIONS Command** — [General reference 1](Help%20System/GSTARCAD/2027/Commands/O/OPTIONS%20Dialog%20Box.md) · [General reference 2](Help%20System/GSTARCAD/2027/Commands/O/OPTIONS%20Command.md) · [Alphabetical reference 1](Help%20System/GSTARCAD/2027/Commands/O/OPTIONS%20Command.md) · [Alphabetical reference 2](Help%20System/GSTARCAD/2027/Commands/O/OPTIONS%20Dialog%20Box.md) - **ORTHO Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/ORTHO%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/ORTHO%20Command.md) - **OSNAP Command** — [General reference](Help%20System/GSTARCAD/2027/Commands/OSNAP%20Command.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OSNAP%20Command.md) - [OUTLINE Command](Help%20System/GSTARCAD/2027/Commands/O/OUTLINE%20Command.md) - **OVERKILL Command** — [General reference](OVERKILL%20Command%20%28General%20Reference%29.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OVERKILL%20Command.md) - **OVERKILL Command Line** — [General reference](Help%20System/GSTARCAD/2027/Commands/OVERKILL%20Command%20Line.md) · [Alphabetical reference](Help%20System/GSTARCAD/2027/Commands/OVERKILL%20Command%20Line.md) [Original category](https://www.gstarcad.net/help/GstarCAD_2027_en-US/menu/commandReferences_O.html)