2012

Table Of Contents
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.
Quick Reference
Commands
EXTERNALREFERENCES
Opens the External References palette.
Work with Underlays
You can control the display of layers, use object snaps, and adjust display
settings with attached underlays.
Control the Display of Layers in an Underlay
You can turn layers on and off in an underlay.
By default, all visible layers of an underlay are turned on when you attach the
file. It is usually convenient to turn off any unneeded layers to reduce the
visual complexity of your work.
Work with Underlays | 1895