Currently to toggle the
treeview on the left-hand side of Windows Explorer we can use: Organize - Layout - Navigation Pane as below screenshot.
I do this very very often and want to toggle quickly by a hotkey. Please share if you know how to.
This thread might be useful:
According to the thread, there are no hotkeys to hide/show the navigation pane, but you can use ALT-T, O to get most of the way there. Another poster suggests using a utility such as AutoHotkey to create a script that you can assign to a custom hotkey.
Here is an AutoHotKey script. ⊞ Win + A toggles the navigation pane.