This dialog allows you to search for and specify the room tag for the item whose properties
currently appear in the Properties window or in the Engineering Data Editor. This dialog opens when you select the ellipsis button 
beside the Room Tag property.
Search string
Allows you to type a string corresponding to all or part of the room tag. The percent character, %, is a wildcard. For example, if you want to list only room tags that contain the letter R, you can type %R% in the Search string box. If you want to display all available room tags, simply type %.
Find
Select to find the room tags that meet the search string criteria.
Results
Displays the room tags that meet the criteria in the Search string box. You can choose a tag in this window and select OK to assign the tag to the item whose properties currently appear in the Properties window or in the Engineering Data Editor.