This addon adds a little XP Bar under your portrait. XP is shown in percentage, you see when you have rested XP (show "(+xxx)" in the bar) and the bar has the same colors than the original XP bar (purple for normal xp and blue for rested xp). When you rollover the bar, you see details about your XP and XP to go (numeric & percent values).

You can set some options : hide/show the XP bar, hide/show the 'XP' text, show normal XP or remaining XP, show numeric or percent XP, can set Auto Remaining XP when reached 10%

You can use shift + left click on the bar to write in the chat dialog box your Current XP ; shift + right click write your XP to Go.

The default position is directly underneath the mana bar on the Player Frame. You can unlock the XP frame by ctrl + right clicking the bar. A small circle will appear to the left of the bar that will allow you to drag it where you want it. You can lock the frame by ctrl + right clicking the drag circle.

To show the options menu, type /playerxpbar in chat dialog box or you can bind a key in the Key Bindings Menu.