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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.
Work with PDF Underlays
You can control the display of layers, use object snaps, and adjust display
settings with attached underlays.
Control the Display of Layers in a PDF Underlay
You can turn layers on and off in a PDF 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.
Use the PDFLAYERS or ULAYERS command, Underlay Layers button on the
PDF Underlay visor, or right-click a selected underlay and click View PDF
Layers.
NOTE If the Underlay Layers dialog box is empty, there are no layers in the
underlay.
You can use the Properties Inspector to determine whether any layers are
turned off in an underlay.
If no layers are turned off, the Layer Display Override property is set to
None.
If at least one layer is turned off, the Layer Display Override property is
set to Applied.
Modify the Position, Scale, or Rotation of a PDF Under-
lay
You specify a PDF underlay's position, scale, or rotation when you attach an
underlay file. You can also modify these settings later during the drafting
process.
484 | Chapter 11 Share Data Between Files
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