After selecting their game, they must decide how much they want to wager, which is usually modifiable with buttons or sliders. Symbol alignment and reel spinning. Players only need to prall rummy appsess the spin button or pull the lever (in conventional machines) to start the reels spinning after placing their wager. The goal is to line up matching symbols on the allotted paylines; the most lucrative symbol is frequently the recognizable "777" symbol. For 777 slots to maximize possible winnings, paylines must be understood. Recognizing special symbols and paylines.