The arrow buttons are located below the Locations field. The left arrow will take you to the previous card in the stack, and the right arrow will take you to the next card in the stack. As of this writing, there are about 540 cards in this stack, so you may want to 'find' your information rather than using the arrow buttons, as it may take longer to navigate through the stack using them. You can also use the left and right arrow keys on the keyboard to go to the previous and next card respectively. In the cards where the ZIP codes are displayed, you can use the up and down arrow keys on the keyboard to scroll the Locations field up or down a screen. Holding down the option key and clicking on a scroll bar arrow will quickly scroll the Locations field's contents.