People using Windows 7 and 10 may know that ALT-P will turn on/off the preview pane for whatever folder you’re in. I made an Autohotkey script that does the same thing for the Windows navigation pane, so that ALT-N turns *that* on and off.

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#IfWinactive ahk_class CabinetWClass ; toggle navigation pane
!n::
Send ^e{Tab}
Send {Down}ln
return
#Ifwinactive,

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^^ If you’re running Autohotkey on Windows 10, you might prefer to use this script, over the right-click option from a previous post.

Hope you enjoy!
—Moon