Left Controller stick => Move Cursor
click/pressed down => right click on mouse
Right Controller stick => move camera
click/pressed down + hold + left controller stick over units + release => selecting units on field
click/pressed down w/ units on fields highlighted + left controller stick => move units under the cursor
D - pad and A, B, X, Y, +, -, L, R buttons (12 buttons)=> hot keys
ZL and ZR buttons = scrolling up and down saved unit groups/ buildings through crtl + # on pc
Wii U screen => top part
10 saved groups of units and buildings
*Imagine the top part of the screen with boxes labeled 1 to 10 from to right. You can click on those boxes after highlighting a unit to save them there. Click again to reactivate. Click X and R or d-pad up and L to delete the units from that saved group.
*You can also save units by pressing ZL and ZR at the same time and pressing A, B, X, Y, +, -, Dpad up, down, left, right buttons
bottom rest of the screen
*shows highlighted unit with the units body health in body structure. larger screen will allow HP over the units as well.
Second screen can also show map by pressing L and R button at the same time. Touching on the place of that map will be the same as clicking on the HUD map in SC II. You can also save a map screen and the top part of the gamepad screen will have one button in the center to divide the screen into 4 equal sections like a XY coordinate plane. Each quadrant is a map saved. Save a portion of the map by moving the gamepad over the TV screen
Game screen on TV
*Same HUD as PC and function
APM will probably suffer but I think I covered everything.
I guess you can do this on PS3 and 360 since I barely made use of the second screen O_o