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On Catalina 10.15.6 (and even on High Sierra), typing either Option-N or Option-P pops up a series of "quick looks" at all my current "application windows." But I am unable to find any documentation about what this is called (it only appeared in 10.14, I believe).

I have spent--truly--hours looking up how to understand and change this behavior...shocked this is not mentioned anywhere.

While I can see some value in this behavior, I use those keys in Emacs (as well as Logic Pro), where N/P keys are frequently used as mnemonics for "next/previous." While I have worked around this in Emacs by using ESC as a substitue, I want to free up Option-N and Option-P again.

If I can learn the name of this operation, I will gladly also rebind those functions to non-conflicting shortcuts.

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  • Have you tried System Preferences->Keyboard shortcuts tab? Those key combinations do nothing on my Catalina Macs and are not listed here: support.apple.com/en-us/HT201236
    – bitfiddler
    Commented Sep 9, 2020 at 15:14
  • I'm guessing you have "Application Windows" & maybe Mission Control itself set to that, in System Preferences->Keyboard > Mission Control. That's the only thing I can think of that might be considered 'quicklook' without actually being QuickLook itself.
    – Tetsujin
    Commented Sep 9, 2020 at 16:28

1 Answer 1

Reset to default
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Thanks--the comments made me realize that I was barking up the wrong tree.

This shortcut was not a system shortcut but actually provided by Hammerspoon, specifically a feature (not a bug) of https://github.com/agzam/spacehammer, which is designed to provide convenient shortcuts for an "Spacemacs" workflow:

Other features

  • Alternative App Switcher Option n/p
  • Simple tab switcher for Chrome and iTerm Option j/k

Quitting the whole Hammerspoon process gave me back those keys.

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