Project Explorer window too wide

I recently upgraded my Office Version (on 365). Now my Project window in the Project Explorer stretches all the way across. How do I resize it to the width of the Properties window?

Grab it by the gray bar and drag it to the left so it becomes a floating window. Then drag it again to the top left to lock it in.

Watch video

Jeff, you're my hero! That did the trick. Easy solution, once you know how to do it. Another one of those "it's so simple" after the fact. I appreciate your help.

Glad to help!