TL;DR
Use the + icon on a page to add an action to a page.
Overview
You can add three types of actions to a page: launch an activity, launch a live question, and open a link.
Choose the Action You Want to Add
- Click on Add presentation.
- You can now create a new presentation or import an existing presentation.
- To add an action to the page, click the + icon in the upper-right corner of the page.
- Choose the action you want to add.