Save a draft while you work

Contribute automatically saves a copy of your draft when you switch to the browser, switch to another draft, publish the draft, or exit Contribute. You can use the Preferences dialog box to set time intervals for automatically saving the draft. This will minimize the possibility of losing unsaved changes under adverse circumstances.

When you edit a page or blog entry (see Edit existing web pages and blog entries), Contribute automatically saves the page or blog entry as a draft, and the draft title appears in the Pages panel in the sidebar.

 community help (adobe.com)