Video Pencil can be controlled from CueCam Presenter using the Video Pencil toolbar item.

You can right-click any of these items for a deep link.

This will give you something like cuecam://ipad-control/select-tool/1

To trigger this change from a card, add a URL trigger:

Click the trigger attachment and paste in the url.

Now when you present this card, the relevant tool will be selected.