I'm a newbie and have trouble getting my menus back into default position

Hi,  I have a 30 day trial version of Solidworks.  I'm doing tutorials now but I've inadvertantly moved some user interface items around and repositioned them.  I would like to get my user interface back to default positions.  What I mean by that is I'd like to get all my menus back the way there were when I first installed Solidworks.  How can I get all my menus/toolbars/tabs back in default position?  Thanks for any advice you can give.  GL

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