Trigger a zoom region

In creating a e-learning content for "the little more stubborn" student via Storyline 360, it would be fun to be able to trigger a zoom region with a mouse click. In our software all buttons have hot keys, like Alt O to use the OK button, where the O is underlined. Within the courses I would like them to use the hot keys instead of clicking the button. My idea was to add a zoom region on the button, so if they click instead of using the hot key, it would zoom in to hint them to use the hot key. Currently in Storyline there is no option to add a trigger on a zoom region and it will always "play". It would be a great addition if you could also trigger a zoom region instead and only play if the student clicks the zoom region.