JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Add Documents to an Existing Flat Set, Using the Set Contents Window Do one of the following: Select a flat and select Document > Set > Content. orDouble-click a flat set. The set contents window opens displaying the documents in the set. Drag documents into the set contents window from the current folder or from other folders. Parent topic: Working with Flat Sets