# O [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [Commands](Help%20System/GSTARCAD/2021/Commands/(Commands).md) ## Topics - [Graphic Compare Command](Graphic%20Compare%20Command.md) - [O Command](Help%20System/GSTARCAD/2021/Commands/O/O%20Command.md) - [OBJECTSCALE Command](Help%20System/GSTARCAD/2021/Commands/O/OBJECTSCALE%20Command.md) - [OFFSET Command](Help%20System/GSTARCAD/2021/Commands/O/OFFSET%20Command.md) - [OLELINKS Command](Help%20System/GSTARCAD/2021/Commands/O/OLELINKS%20Command.md) - [OLESCALE Command](Help%20System/GSTARCAD/2021/Commands/O/OLESCALE%20Command.md) - [OOPS Command](Help%20System/GSTARCAD/2021/Commands/O/OOPS%20Command.md) - [OPEN Command](Help%20System/GSTARCAD/2021/Commands/O/OPEN%20Command.md) - [OPENSHEETSET Command](Help%20System/GSTARCAD/2021/Commands/O/OPENSHEETSET%20Command.md) - [OPTIONS Command](Help%20System/GSTARCAD/2021/Commands/O/OPTIONS%20Command.md) - [ORTHO Command](Help%20System/GSTARCAD/2021/Commands/O/ORTHO%20Command.md) - **OSNAP Command** — [Command Line](Help%20System/GSTARCAD/2021/Commands/O/OSNAP%20Command%20(Command%20Line).md) · [Reference](Help%20System/GSTARCAD/2021/Commands/O/OSNAP%20Command%20(Reference).md) - [OVERKILL Command](Help%20System/GSTARCAD/2021/Commands/O/OVERKILL%20Command.md)