XP bar: layers for the XP of completed quests and of incomplete quests, with your own colours and transparency and textures.
Quest XP behind quest names in the quest log and the objective tracker.
Detailed XP bar tooltip: current XP, XP to level, progress, rested XP, XP of completed and open quests, your last 3 kills, kills to level, XP per minute and time to level.
XP window: XP per minute (any XP source), time to level and kills to level.
Each line can be switched on and off and its text can be changed. Border, background, colours, font etc.
Note
With the gamepad UI, Blizzard may block actions while addon options are open. Turn the gamepad UI off while you change settings, then turn it on again or your game may freeze.