How to keep email header from opening text... ?

H

hfx33

How do I do the following:

I want to stop the body of my email message from opening automatically when
I highlight the header. ( but not double click it, I know it will open if I
double click )

This lets me delete spam without reading the crap.

I think I did it once but can't remember/or find the tool.

TIA.
 
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