You can view file-specific information about the PDF underlays that are attached to a drawing in the Reference Manager palette. You can also load and unload PDF underlays and perform other operations there.
In the Reference Manager palette, you can view information about all the underlays in the drawing in the File References or Details panels. The Show Details button in the upper-right corner of the Reference Manager palette to control the display of the Details panel. The Details panel displays the name of the selected underlay, its loading status, file size, date last modified, and found at path.
You can preview a selected underlay and view file details, including
If the program cannot find an underlay, its status is listed as Not Found. If the underlay is unreferenced, no instances are attached for the underlay. If the underlay is not loaded, its status is Unloaded. Underlays with a status of Unloaded or Not Found are not displayed in the drawing.