In this type of slot machine, paylines are not automatically enabled; instead, the player must wager separately on each desired payline. The more paylines they activate, the higher the chance of winning, but each activated line requires an additional coin or credit. If a player does not wager on all the available paylines, they may miss out on a payout if a winning combination lands on an unactivated line.
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For example, a player might be playing a slot machine with five paylines. If they only bet on three of the paylines and a winning combination appears on the fourth payline, they will not win any payout from that combination because they did not activate the fourth payline.