1. From the Left Pane of the Image Browser, select the gallery you want to tweet. Note that your Twitter followers will only be able to freely view galleries whose visibility is set to Everyone.
2. In the Right Pane, click the Share Gallery button and select Tweet this gallery.
3. If you are not already logged in to your Twitter account, then you will be taken to a page that prompts you to log in. Once you sign in, a new window will open to your Twitter page, where you'll see that a new tweet has been started with some pre-populated text and a link to the gallery of your choice.
The URL to your gallery will be shortened via the http://bit.ly service to conserve characters. You may modify any of the default text to your liking prior to tweeting.
4. Click the Tweet button to finish posting to Twitter.