Up to 8 options: the slab grows out of its capsule, right-aligned to it, below it when it fits above y 628 (else above, else over it). The source turns white while open; the current value has a check in the leading slot, no fill. Rows 72, a 40 px header, Steam's Cancel as a 56 px quiet capsule. Laser hover: + .08 and the light at the pointer. Native: +10 mm, non-interactive.

Longer lists: on settings routes, more than 8 options become the list page (settings concept); elsewhere 9–14 use two columns and 15 or more one scrolling column of two-line rows (p2_controls_timezone).