Google has added to Gmail quick action buttons for YouTube, Dropbox, Seamless, and OpenTable. The quick action buttons were firstly introduced to Gmail last year. But today, Google is broadening support for the feature.

Now you can quickly rate and leave feedback on a restaurant you have found through Seamless by clicking a "review" button. OpenTable also lets you edit any dinner reservations you have made directly from Gmail's inbox.

YouTube and Vimeo clips can now be opened as soon as they've finished uploading with a new "view video" quick action button.

Last but not least, Google says that shared Dropbox folders and Google Docs can be accessed through quick actions, eliminating any need to dig through your email for a given link.