# ATTACH Command [GstarCAD 2023](Help%20System/GSTARCAD/2023/Index.md) → [Commands](Help%20System/GSTARCAD/2023/Commands/(Commands).md) → [A](Help%20System/GSTARCAD/2023/Commands/A/(A).md) ## Function Description: This command is used to insert external references, raster images or underlays (DWF, DWFx, PDF or DGN files) to the current drawing. ## Command Access: > **Icon:**  > **Menu:** File > Attach > **Ribbon:** Insert > Reference > Attach > **Toolbar:** Insert > Attach > **Command:** ATTACH > **Alias:** AT **Command Prompts: /** The Select Reference File dialog box is displayed.  --- **Related References：** - [Commands about Underlays](Help%20System/GSTARCAD/2023/Commands/00%20Command%20Groups/Commands%20about%20Underlays.md) **Related Tasks：** - [To Attach and Detach External Reference](Help%20System/GSTARCAD/2023/Commands/01%20Procedures/To%20Attach%20and%20Detach%20External%20Reference.md) - [To Attach and Detach Raster Images](Help%20System/GSTARCAD/2023/Commands/01%20Procedures/To%20Attach%20and%20Detach%20Raster%20Images.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2023_en-US/detail/commandReferences/ATTACH.html) · © Gstarsoft Co., Ltd.