# External Reference Palette [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [Dialog Boxes](Help%20System/GSTARCAD/2027/Commands/03%20Dialog%20Boxes/(Dialog%20Boxes).md) ## Function Description: The External References palette organizes, displays and manages referenced files, such as DWG files, DWF, DWFx, PDF or DGN underlays, raster images, point clouds and coordinate models.  **Palette Options:** ##  Attach DWG button Opens the Select Reference File dialog box, where you can select a format from the list to attach files to the current drawing. ##  Refresh/Reload All References button Refreshes the list display or reloads all references to display any changes that may have occurred in the referenced files. ##  Help button Opens the Help system. ## File References - / List and Tree View buttons: Clicks the buttons to switch between list and tree view. - List of Referenced Files: Displays a list of references in the current drawing, including information such as status, size and date of creation. Double-click the file name to edit it. ## Details Displays information or a preview image of a selected reference. - / Details and PREVIEW buttons: Clicks the buttons to switch from the details display to a thumbnail preview. - Details: Provides information about the file selected under File References. You can modify some information by clicking the right column. - Preview: Shows a thumbnail image of the selected file under File References. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences/EXTERNALREFERENCES_DIA.html) · © Gstarsoft Co., Ltd.