How do I activate and then deactivate an expanding menu from the same button?
I have the usual 3 short horizontal lines to indicate there is an expanding menu. I click the lines and the menu expands. So far so good. How do I make it so that if I then click the three lines again the menu then contracts? Basically, I need the little graphic of the 3 lines to play the same timeline again, in reverse, on the second click.