2011

Table Of Contents
To detach an underlay
1 Click Insert tab Reference
.
2 In the External References palette, in the File References pane, select the
underlay you want to detach.
3 Right-click on the underlay and click Detach.
The underlay is no longer linked to the drawing file. All instances of the
underlay are removed from the drawing.
NOTE 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.
Quick Reference
Commands
EXTERNALREFERENCES
Opens the External References palette.
Unload 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. Unloading an underlay does not remove its link. If
you do not have sufficient memory to open multiple underlays in a drawing,
underlays are automatically unloaded.
To unload or reload an underlay
1 Click Insert tab Reference
.
2 In the File References pane, select a DGN underlay.
3 Right-click, and click Unload or Reload.
When unloaded, the DGN underlay is still linked to the drawing file, but
it is not displayed in the drawing.
Attach, Scale, and Detach Underlays | 1759