To open a Book tab, click the + button in the upper-right of the Coda window, then click Book .
Books for many popular languages and frameworks are preloaded for you. To open a reference website, double click on the corresponding book. The reference can be navigated as you would any web page in a browser.
To learn how to add custom reference books, see Adding reference books
To learn how to jump directly to a book from the editor, see Looking up a specific language keyword