Selecting multiple objects in the Trigger Wizard? I need this in my Storyline life!

I recently stumbled across a YouTube video posted by Learning Dojo, which shows a feature/option that would prove invaluable!

In the video he's demonstrating how to trigger an event using conditions across multiple objects. From his drop-down window he's able to tick off multiple objects at once and apply one condition to all of them. See the photo below. I've circled the feature I'm talking about.

In my version of Storyline I have to select each object one at a time and add the condition to each object as I select it.

How can I get this option?