By default, Adobe InDesign’s Pages panel displays Master Pages and Document Pages in a top-down vertical view. This is fine for a single page document, but for a document with dozens of pages and multiple Master Pages, it get pretty annoying scrolling up and down in the Pages Panel.
By visiting the flyout menu in the upper right of the Pages panel, and selecting Panel Options… at the bottom of the list, you can adjust your Master Pages and Document Pages to display horizontally by unchecking the Show Vertically check boxes. Setting the Sizes drop-downs to Small also helps in displaying more pages in a small space – perfect for users working on a laptop with smaller screens.
As you can see in the bottom half of the image, you’ll get a better view of your document pages in the Pages panel doing this than you would by default in the top half of the image.