UNPINNING THE OPTIONS PANEL
The Options Panel is the panel that sits at the top of the Worksheet Window. Here is an example:
At the very top right of these panels, you will see a red 'pin' - clicking this pin will toggle between 'pinning' the options panel to the top panel (as above) or 'unpinning' it and showing it in a separate window at the top left (initially) of your monitor (as below).
Moving between worksheets will result in the destination worksheet having the same 'pin' mode as the one being left.
The primary benefit of this feature is to reduce the amount of monitor space take up by multiple option panels in multiple open worksheets - especially critical where one may have to work on small screened laptops.