Preview mode provides a quick preview of the drawing objects the query will display in the current drawing. You can run a query in Preview mode and check the objects the query produces. If there are too few or too many objects, or objects are displayed in the wrong location, revise the query as necessary.
To run a drawing query in Preview mode
To clear objects queried with Preview mode, use the REDRAW or REGEN commands. You can also click Redraw in the Define Query Of Attached Drawings dialog box.