Twitter-owned live video streaming service Periscope is currently testing a new feature that lets you temporarily draw on your live streams. This means you can use the feature to quickly highlight stuff that you want to point out to your audience.
Given that the feature is currently in testing, it's only available to select Periscope beta users, although the company is promising a wider roll-out soon.
"We’re testing Sketching with a small group of people," Twitter said when asked for comment. "This feature makes it fun and easy for broadcasters to draw on the screen while broadcasting. Coming in a few weeks for everyone!"