Keeping a button hidden until certain other buttons have been clicked
Is there a way to keep a specific button hidden on a slide until other buttons have been clicked? For example, I have a "Continue" button at the bottom of my slide. I don't want that button to appear until all other buttons on the slide have been clicked to view their content. I figured out how to retain custom states for the buttons, so maybe have some kind of conditional action on entry of the slide that says "if all buttons have a state of X, then show Continue button, else keep it hidden".
