Hi Ximber, welcome to the community.
Are you using a Windows PC or a Mac to attend the webinar? The attendee window is designed to stay in front, if you have the attendee window minimized or behind another application window you will be shown as inattentive in the webinar which may be an issue if the webinar is some kind of required class or training.
If you have an Android or iOS phone or tablet you could attend the webinar using our free mobile app. That way you can see and listen to the webinar and still have access to the applications on your desktop at the same time.