The default transition for a desktop storybook is to flip between pages. When viewing on a mobile device, the default transition will be a vertical scroll from page to page. You have the option to alter these transitions. On desktop, you can choose instead to have the pages slide rather than flip. On mobile, you have the option for the pages to slide horizontally rather than vertically.
To modify these settings go to the “My Studeo” dashboard and click “Account Settings”. Click the tab called “Storybook Settings” and toggle on the transition setting of your choice. Note any change will impact future and republished storybooks only. It will not update previously published storybooks automatically.