So you will see a few more menu commands over time. (slaw.ca)
The eBook starts up and responds to menu commands slightly faster than the Cool - er, but it's much slower than the PRS - 505 overall. (cnet.com)
In battle mode the A button confirms menu commands and activates the primary weapon, the B button calls up the battle menu, the X and Y buttons activate the secondary weapons, the R button activates the special attack, and the Z button can be configured to perform any number of commands from replenishing power from a sub tank to running away from battle. (pressthebuttons.com)