"The Key Combination Shift+Command+F cannot be used..."

[JacobTaylor-RCC]

macOS version: 10.14.6
Rectangle version: 0.32
logs (In Rectangle menu, hold option, "View Logging..."): no log entries

See included screenshot. That combination is not bound, I both deactivated the binding in the OSX keyboard menu part of system settings and also totally cleared the binding. This is the shortcut I used with Spectacle, but rectangle blocks its use. I also restarted rectangle just in case it didn't stick without a restart. Halp?

[rxhanson]

Just check the box for "Allow any keyboard shortcut" in the settings tab of the prefs window.

[JacobTaylor-RCC]

oh! Got it, thank you.

[vanderhoop]

For anyone else who stumbles on this issue with newer versions of Rectangle, just a heads up that the option you need to engage has been renamed to 'Remove keyboard shortcut restrictions'.

Rectangle version: 0.57

[alichtman]

The option you need to engage has been renamed to 'Remove keyboard shortcut restrictions'.

This option is in the Rectangle settings, not macOS settings.