This might be a silly question--and it might be in the wrong forum!--but does one button a tweed Argyle jacket when this is worn with a matching waistcoat?

In part I'm asking as I've just acquired a tweed waistcoat and jacket set, and while the waistcoat fits perfectly, it seems that the jacket isn't supposed to button over it... I've also noticed very few people with buttoned Argyles in pictures!

Thanks for any insight!