In order to enable your daily specials, you will need to activate this feature by going to the restaurant add-on and edit the dish that you are wanting to include in the daily special menu. While you are on the item's page you want to scroll to the bottom of the page, and just above the SEO portion, you will tick the option Add to daily specials.
Choose the price for your daily special, as the price may differ from the listed price. You can then choose what day this will be special, or choose multiple days, so that it will appear automatically on your website.
Save and then continue adding other daily specials as needed. You can change your daily specials at any moment from the website manager.