[Users] Newbie how to save plain text

[Frank Ernest]

> echo "%s" > %u
> 
> To use this you need to select the text that you want to be saved,
> (represented by %s in the command), run the Action,
> (Tools/Actions/Save as...). A dialogue will appear in which you
> write the full path, (e.g. /home/user/savedMails/my_saved_mail).
> (The %u is what prompts for this path via a dialogue.)

Ok, but I wanted the whole thing headers and all.
Also, how do I get this action into a menu or keybinding?

Thanks, David