Shortcut of zooming out in Notes
This is because of a bug, shift + command + , is equal to the command that checks grammar/misspelled words (command + ;).
To fix it, follow this link to a guide, but as Application, select Notes, and as Menu Title, type Zoom Out, and in the Keyboard Shortcut field, do any key combination you like, log out of your user account, log in again, and you’re done...