Hello Richard, sorry about your problems. My name is Marco and I will do my best to help you.
To exit full-screen mode in Microsoft Edge, you can press the F11 key to toggle full-screen mode on and off.
The location of the search bar in Edge is not customizable. It’s designed to be at the top of the browser for easy access.
However, you can customize the appearance of your toolbar in Edge by going to Settings > Appearance > Customize toolbar.
If the search bar has moved to an unexpected location, it might be due to an update or a change in settings. If it’s causing significant inconvenience, you might consider resetting Edge settings to their default status.
If it's not this search bar you're talking about, you can send me a screenshot to show me.