When you are displaying the results of a comparison, the visibility command gives you the possibility to select which entities are displayed. Use this command only if your current AutoCAD drawing shows the result of a comparison, either Detailed or Basic.

CompareDWG visibility dialog

If your current drawing is the result of a Detailed Comparison, you can select the following sets of entities:

Old Drawing Deleted, changed and unchanged Entities.
New Drawing Added, changed and unchanged Entities.
Combined Drawing Deleted and changed Entities from the Old Drawing together with added, changed and unchanged Entities from the New Drawing.

If some entity sets are not available (for example there are no deleted Entities) then this option will not be accessible. If your current drawing is based on a Basic Comparison, y