Toggle Metronome Click - Smart Tempo Editor    M

Turn the metronome click on or off. No need to click that button with the pointer/cursor sitting over it.

Clicking with a mouse is probably not sensible to lots of people. Trackpad is far more likely to be used by beginners. Need to use terms like position the cursor/pointer instead of move the mouse.

Work in the Logic Pro Smart Tempo Editor — Apple Support

Metronome button: Turn the metronome on or off.