How to use the icon page in game.
Hover your mouse over a hotbutton rightclick and hold will bring up a small menu.
chose the Assign Icon and that will open another window.
NOTE the Type: with the dropdown in the top left corner, choose Menu in that dropdown.
Then on the menu their should be two pages, chose the color you want and the border color and click it. It will appear on the top right. then click the accept button.
DONE !
Another NOTE or Tip if you like, you can use this same right hold menu to change the Label for all those jumbled long named AA buttons.