During a call, any participant can present their screen by clicking the Share your screen icon. You can select your full desktop or a specific application window to share, then click Share.
Allow others to draw on your screen
By default, your teammates can draw on your screen while you're presenting. To turn this off, click the group drawingicon. You can also draw on your screen by clicking the pencilicon. Use this tool to draw attention to specific sentences, charts, data points or whatever else is important to call out.
Note: When you're sharing a specific application window, you won't be able to allow others to draw on your screen or draw on your own screen.
Step 3: Review screen-sharing tips
During a call, only one person can share their screen at a time. When you've finished presenting, the next person can start sharing to take control. Yay teamwork!
The team member sharing their screen becomes the active speaker by default: other teammates on the call will only see the active speaker's screen, even when others are talking.
If you use Slack in Google Chrome, you can choose if you'd like to share your entire screen, a single application window or a specific Chrome tab. You won't be able to allow others to draw on your screen, or draw on your own screen.
Screen sharing in Slack requires transparent windows, but these are unavailable with some Windows 7 desktop themes. Here's how to make sure that you’re using transparent windows: