Tools
Accessed by pressing the Tools tab or pressing 5.
Level XP
This is just a simple calculator that lets you see what percent an xp reward is for a particular level. (You can also quickly find out the xp required for a particular level). Adjust the level using the up and down arrows or by replacing the text number with a new one. The top left box is the xp reward, which you can change, the lower left box is the amount of xp for that level. The percent calculation will automatically adjust whenever the reward or level values change. (The arrows make it easier to step through levels to try to guess where the level might max, when you find a nice round %).