The constraint

Nobody reads a menu board standing still. They read it from the back of a queue, at an angle, while deciding whether to stay. That single fact decides the type size, the contrast and the ordering.

Illuminated shopfront signage
Shopfront and board designed as one system, so the two don't fight each other.

What changed

Fewer items per panel, prices aligned on a single axis, and the two things the café actually wants to sell sitting where the eye lands first.