About Unloading Underlay Files

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. 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. 
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