The office hours program called GoToWebinar has a control panel that offers participants a way to chat or ask questions.
You can also use your microphone to ask questions live!
The control panel can be anywhere you place it, but its default location is on the right side of your screen. The exact set up will vary based on your device and operating system and browser.
To learn more, you can review these GoToWebinar help links:
How to join: https://support.logmeininc.com/gotowebinar/join
How to join a test session and configure settings: https://support.logmeininc.com/gotowebinar/help/join-a-test-session-g2w060001