Skills bound to certain keys?

Hey guys!

Are certain skills bound to (mouse) keys? I am trying to get Cleave off the middle mouse button but I don't see how it can be done. It doesn't matter which socket I use for it or in which order I put my skills in...I always end up with the same skill-key combination as before.
Is there a way to customize this?

Thanks!

Click on the skill icon on the bar, you can choose what skill to put there (or the X to make the spot blank).

Oh...that was way easier than I thought. Thanks!

=D enjoy!

If you want to get even more advanced, you can play around with which keys on the keyboard the skills are bound to by going to the keybinds section of the options, but I'd say leave it with the simple 1-5 until you get a definite feel for the game. ^_^