Watch this short demo on where to find, and how to use the recording tools.
Screen Recording is found in the content menu on the right hand side.
The dual option with both screen and camera recording gives you a head bubble over the material you show on the screen. Click "Use video" to save your recording.
The saved recording appears on the slide in your video project.
This is now a video clip that can be further edited; trim clip, add intro slide, texts, subtitles etc.