Hotkey to hide the headers in Classic view

[Ex-chemist]

My eyes are not as good as they once were and I need reasonably large text.  In the classic view it would be very helpful if there was a hot key to turn off / on the messages headers when I am reading an email.  Most of the time I do not need to see these.  As of now the headers take up a lot of screen space and I can fine no way to compact or hide them.

[Jon]

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