Oooo, thank you! Knowing that existed led me to https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/EventOverview/TextDefaultsBindings/Te

Oooo, thank you! Knowing that existed led me to https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/EventOverview/TextDefaultsBindings/TextDefaultsBindings.html https://developer.apple.com/library/archive/documentation/Co... and https://developer.apple.com/documentation/appkit/nsstandardkeybindingresponding?language=objc https://developer.apple.com/documentation/appkit/nsstandardk... This leads me to believe that this will work: "~t" = "transposeWords:"; /* M-t */ Edit: Sadly, `transposeWords:` doesn't work, despite showing up in Apple's docs—it just beeps when I try to use it.