Edge: Unable to expand a narrow History window  

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I have Edge 89.0.774.57 (up to date), in Wind 10 Pro 2004

I open History by using Ctrl+H within Edge.

Issue: The history is launched in a narrow window, with no tab bar. I can see the Today tab and half of the Yesterday tab (screenshot). There are no sizing handles at top, foot, L or R of window.
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Rebooting the laptop does not remediate.


I can't remember if History has ever worked properly in Edge. I don't use History often.


Using Ctrl+H in Chrome produces the normal history in its own tab.


Question: How do I restore the History window to the normal Chrome behaviour?


Thanks.
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