Hi Jay,
You'll need a toggle button, either with a click box or with a shape (that you can make invisible as well) used as a button. Here are some scenarios for toggle buttons:
http://blog.lilybiri.com/toggle-shape-buttons
Either you have two click boxes in the same place, each with a standard advanced action. First click box is visible, second is invisible. By clicking the first click box, you'll show the checkmark, hide the first click box and show the second click box. With the second click box, do the contrary: hide the checkmark, hide the second click box, show the first click box. It is also possible with one click box, but then you'll need a user variable and a conditional advanced action. See blog post.
Lilybiri
