When excel shows the list of available functions for the entered letters, for
example i've typed =su and i want to use the Sum function. I've highlighted
Sum with the down arrow key. Now i want to hit enter or space or something
like that to use this function, but the only way to select the function seems
to be double clicking with the mouse. I find this annoying since i constantly
have to move my right hand from the keyboard to the mouse and back. Is there
a way to select the formula with the keyboard?