The Tagname field visible length should be increased within Archive Editor in System Management Tools. The full tag name is limited and cannot tell what is listed because the name is cut off. (See screenshot and steps listed below.)
Steps to reproduce:
1. Navigate to PI System Management Tools -> Data -> Archive Editor
2. Search for long tag name
3. Select Multiple tags in the tag search box
4. Click "OK" to confirm selection
5. Select the dropdown icon within the tagname field to list all selected tag names.