You can use the Meeting Options page to change important settings for channel meetings (such as creating a lobby, changing participant roles, etc.).
- Go to the Calendar app in Teams (on the left hand side of the Teams window).
- Create a meeting. Enter the name of a channel in the "Add Channel" field.
- Click the Save button.
- In the Calendar, select the meeting and click on the Edit button.
- You'll now notice a "Meeting Options" button. If Chrome is your default browser, you can click on this button to open the Meeting Options page. If Chrome is not your default browser, do a two-finger click on the "Meeting options" button and paste the link into a new Chrome/Edge window. Hit Return (Mac) or Enter (PC).
- Change your meeting options and then click the Save button.