Aem tru-boost set up how to

so i (sorta) solved the power problem by wiring it directly to the battery. only problem is i have to unplug the back of the gauge every time i turn the car off. maybe i should just rig a switch for it? anyways. . .
now i cant really figure out how to program it so it wont boost past the stock wastegate setting (only 6 psi). if i hold both buttons, the i get to the screen where you choose the unit you want it to read (PSI, bAr, etc) but i cant get it to another setting. any help?