About Detaching Underlay Files
Underlays that are no longer needed can be detached from a drawing file.
When you detach an underlay, all instances of the underlay are removed from the drawing, and the linking path to the file is removed.
To hide the display of an underlay temporarily, you can unload it rather than detach it. This action preserves the underlay location for reloading later.
Erasing an individual instance of an underlay is not the same as detaching it. An underlay must be detached to remove the link from your drawing to the file.
Related Articles
About Attaching Files as Underlays
You can attach a DWF, DWFx, DGN, or PDF file as an underlay to a drawing file. You can reference and place underlay files in drawing files the same way as you do raster image files; they are not actually part of the drawing file. Like raster files, ...About Underlays
You can underlay and snap to 2D geometry stored in DWF, DWFx, DGN, and PDF files. Underlays are similar to attached raster images in that they provide visual content but also support object snapping and clipping. Unlike external references, ...About Unloading Underlay Files
To improve performance, you can unload underlays from a drawing file. When you do not need an underlay in the current drawing session, you can improve performance by temporarily unloading it. Unloaded underlays are not displayed or plotted. ...About Modifying the Position, Scale, or Rotation of an Underlay
You specify an underlay's position, scale, or rotation when you attach an underlay file. You can also modify these settings later during the drafting process. By default, the insertion point of a file is 0, 0, 0, its scale factor is 1, and its ...AutoCAD Keyboard Commands
Learning how to use AutoCAD keyboard commands can help you work faster and improve your efficiency. This article lists the abbreviated commands that can be used in AutoCAD (Toolbox). Toggle General Features Ctrl+G Toggle Grid Ctrl+E Cycle isometric ...
Recent Articles
Microvellum Release Notes | Build 25.2.0406.641
The following release notes apply to Microvellum build 25.2.0406.641. Label Image Fix Fig. 1: An error noting an incorrect number of Label Images. An issue was reported wherein creating new G-code from an existing work order that was edited using ...Microvellum Foundation Library Release Notes | Build 26.0327
The following release notes apply to Microvellum Foundation Library build 26.0327. Additions Added new Formula Driven Materials (FDM) and accompanying special FDM project wizard. * New Specification Group “Wizard Formula Driven Materials [FDM]”. New ...Formula Driven Materials (FDM) User Guide
The formula driven material (FDM) system in Microvellum automates the creation and management of materials within a project. By using predefined lookup tables and intelligent formulas, FDM dynamically generates each material’s name, thickness, and ...Microvellum Release Notes | Build 25.2.0330.641
The following release notes apply to Microvellum build 25.2.0330.641. Formula Editor Fix There was a recurring issue wherein attempting to edit any formula within the Part Properties of the software would result in an error. This would only occur ...Microvellum Release Notes: Year of 2026
This document will catalog all releases for Microvellum software builds that are released in the year 2026. This currently encompasses builds 25.2.0114.641 to 25.1.0406.641. Microvellum Release Notes | Build 25.2.0406.641 The following release notes ...