The fifth step is to add interactivity to your web publication. Interactivity can enhance the user experience and engagement of your web publication. You can use the Buttons and Forms panel, the Hyperlinks panel, and the Object States panel to add interactivity in InDesign. The Buttons and Forms panel allows you to create buttons, text fields, check boxes, radio buttons, and other interactive elements. You can also assign actions to your buttons, such as go to page, play animation, or show/hide content. The Hyperlinks panel allows you to create hyperlinks to other pages, documents, or websites. You can also create cross-references and bookmarks. The Object States panel allows you to create multi-state objects, such as slideshows, galleries, and tabs. You can also add animations and interactivity to each state of your multi-state objects.