Click on the General tab, hold down and move it where you like. As far as resize it would like to think its the same as a PC and hover near the top right corner with \\\ in it, click hold and expand.
This is correct, and just to expand a bit, to access the mouse option with your ps3 controller, hold L1 and hit R3 to switch to mouse mode. Then R2 and L2 act as your mouse keys. You could also just plug in a USB mouse to simplify things altogether.