You can view a detailed pay table and summary of selectable paylines by pressing the Paytable button on the slot game interface.
The Paytable button is used to view the payout rules page.
Every variation of Slots has an embedded page that shows the special symbols used in the game, the payouts for symbol combinations, selectable paylines, and explains any additional features used in the slot variation (number of free spins, available jackpots, etc.)