Help with custom button

Hello,

Could someone please explain step-by-step how to create a drop-down filter button like in the tutorial as I did not understand which buttons to click?

  1. Watch tutorial again
  2. Rinse, repeat if necessary

Edit by Nudel to avoid bumping the post: More detail on this question can be found here:

resource.dopus.com/modules/newbb ... 8&forum=13