# Commands about Underlays [GstarCAD 2024](Help%20System/GSTARCAD/2024/Index.md) → [Commands](Help%20System/GSTARCAD/2024/Commands/(Commands).md) → [Command Groups](Help%20System/GSTARCAD/2024/Commands/00%20Command%20Groups/(Command%20Groups).md) **Commands：** - [ATTACH](Help%20System/GSTARCAD/2024/Commands/A/ATTACH.md) - [DGNADJUST](Help%20System/GSTARCAD/2024/Commands/D/DGNADJUST.md) - [DGNATTACH](Help%20System/GSTARCAD/2024/Commands/D/DGNATTACH.md) - [DGNCLIP](Help%20System/GSTARCAD/2024/Commands/D/DGNCLIP.md) - [DGNLAYERS](Help%20System/GSTARCAD/2024/Commands/D/DGNLAYERS.md) - [DWFATTACH](Help%20System/GSTARCAD/2024/Commands/D/DWFATTACH.md) - [DWFLAYERS](Help%20System/GSTARCAD/2024/Commands/D/DWFLAYERS.md) - [EXTERNALREFERENCES](Help%20System/GSTARCAD/2024/Commands/E/EXTERNALREFERENCES.md) - [IMAGEATTACH](Help%20System/GSTARCAD/2024/Commands/I/IMAGEATTACH.md) - [NCOPY](Help%20System/GSTARCAD/2024/Commands/N/NCOPY.md) - [PDFADJUST](Help%20System/GSTARCAD/2024/Commands/P/PDFADJUST.md) - [PDFATTACH](Help%20System/GSTARCAD/2024/Commands/P/PDFATTACH.md) - [PDFCLIP](Help%20System/GSTARCAD/2024/Commands/P/PDFCLIP.md) - [PDFLAYERS](Help%20System/GSTARCAD/2024/Commands/P/PDFLAYERS.md) - [PROPERTIES](Help%20System/GSTARCAD/2024/Commands/P/PROPERTIES.md) - [VPCLIP](Help%20System/GSTARCAD/2024/Commands/V/VPCLIP.md) **System Variables：** - [DGNFRAME](Help%20System/GSTARCAD/2024/System%20Variables/D/DGNFRAME.md) - [DGNOSNAP](Help%20System/GSTARCAD/2024/System%20Variables/D/DGNOSNAP.md) - [DWFFRAME](Help%20System/GSTARCAD/2024/System%20Variables/D/DWFFRAME.md) - [DWFOSNAP](Help%20System/GSTARCAD/2024/System%20Variables/D/DWFOSNAP.md) - [ERHIGHLIGHT](Help%20System/GSTARCAD/2024/System%20Variables/E/ERHIGHLIGHT.md) - [PDFFRAME](Help%20System/GSTARCAD/2024/System%20Variables/P/PDFFRAME.md) - [PDFOSNAP](Help%20System/GSTARCAD/2024/System%20Variables/P/PDFOSNAP.md) - [UOSNAP](Help%20System/GSTARCAD/2024/System%20Variables/U/UOSNAP.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2024_en-US/detail/commandReferences/Commands%20about%20Underlays.html) · © Gstarsoft Co., Ltd.