Repeats the last command. Use this option to repeat (or redo) an action that you may have chosen to undo. For example, suppose you change a symbol’s fill color from green to blue, and decide that you do not like the blue, and therefore use the Undo (CTRL + Z) command to revert the color back to green. But then you are not so sure you do not like green and would like to see the blue again. Instead of manually repeating the action where you changed the fill color, you can now just use Redo (CTRL + Y) to repeat the action where you changed the fill color from green to blue.