What's this on the right side of the Solidworks interface?

I have a curiosity, why some computers stay this way, when I apply the full screen in the SolidWorks?

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2 Answers

Is it a system with dual (or more) monitors?
It might relate to the option which allows SolidWorks to span multiple monitors.

 
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...are you referencing the light blue border of the file windows?

Or the "Task Pane"?

 
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