To create a popup you can use the "popup" widget from the 2D canvas of your view. Simply drag and drop the popup widget icon onto the canvas location.
To control the popup via a button or toggle button, you can use the events associated to the button widget. To do this... select the button to use and scroll down to the bottom of it's properties. Here you will see the events. Select and drag the arrow next to the desired event (click/pressed..) and drop it on the popup window in the canvas or its representation in the view tree. This will popup the service options to "show" or "hide". Choose your binding and you should be good to go.
