Hide/Show Sidebar shortcut

Is there a keyboard shortcut for Hide/Show Sidebar? I cannot seem to find a menubar command for this, similar to Tools>Inspectors>Show/Hide. When I hover over the toolbar item, I see Show/Hide Sidebar as a tooltip. Attempting to set a keyboard shortcut for this command using the system prefs doesn’t appear to work.

You could e.g. use Cmd-Alt-1 as the navigation mode is usually used most of the time.

Thanks @cgrunenberg, that works perfectly. I had tried a couple of other combinations that were not working, so must have been clashing with other shortcuts. I didn’t see the ones I tried listed in the Appendix – is that a definitive list of default shortcuts?

The appendix includes only shortcuts which are not obvious (not part of the main menu).