Tag Palette
Clicking the tag icon on the right side of the main menu bar shows a Tag Palette:
The Tag Palette in the sidebar has the same features as the existing pull-down Tag Palette on the main menu bar, also supporting drag-and-drop tagging (#23).
Drag-and-drop Tagging
Drag-and-drop Tagging allows you to drag a tag from a Tag Palette and drop it onto a fragment.
You can drag a tag from a palette:
And you can drop it onto a fragment: