Add CAD files to the Content Pane in a Only Visualized mode.

[MiguelMartinezYordan]

In ArcMap, you used to be able to open a CAD file in a Read Only mode. An if you wanted to create a shapefile you had to go inside the CAD file and add the polygon or the polyline. But the Read Only mode was great if you only wanted to used the CAD as reference. It was a separate white background file display in the Add Data window right after the Light Blue colored CAD file.