Roulette settings
Rule changes take effect from the next hand or game — never mid-round.
Wheel
European has one zero and a 2.70% house edge on every bet. American adds a second green pocket (00), which pushes the edge to 5.26% — nearly double — on every bet except the basket, which is worse still. Applies from the next spin.
La Partage (European only)
When 0 hits, even-money bets (red/black, odd/even, high/low) lose only half the stake instead of all of it. That halves their house edge from 2.70% to 1.35% — the best bet available here. No effect on other bets, and not offered on the American wheel. Applies from the next spin.
Spin speed
How long the ball runs before it drops. Instant skips the animation and shows the result immediately. Applies immediately.
Show hot & cold numbers
A tally of which pockets have come up recently. It is a curiosity, not a predictor: the wheel has no memory, and every pocket is equally likely on the next spin regardless of what the board says. Shown as a gambler's-fallacy exhibit.