This is part of the core functionality, but shouldn't take too much time. All you need are two buttons. On the left, it should go to the previous page (from page2 to page1 and then page1 to index, etc.) and the right button should go to the next page. (The last page shouldn't have a right button and likewise the index page shouldn't have a left button)
This is part of the core functionality, but shouldn't take too much time. All you need are two buttons. On the left, it should go to the previous page (from page2 to page1 and then page1 to index, etc.) and the right button should go to the next page. (The last page shouldn't have a right button and likewise the index page shouldn't have a left button)