Workspace : Searching Items : Advanced Search Features : Add/Remove Row Buttons
 
Add/Remove Row Buttons
Pro Tools lets you refine your search by up to 8 rows of search criteria.
Add Row Button
Click the Add button (“+”) to add another row to refine the advanced search.
*Press Shift + “+” (plus) or to add a new row.
Remove Row Button
Click the Remove button (“–”) for a row to remove that row.
*Press Shift + “–” (minus) to remove the bottom row.