ScreenSteps will store revisions of articles each time you check one back in. You can view previous versions of an article, copy content out of a previous version or make a previous version the current version.
Open the article revision dialog
You can open the dialog using the article gear menu or the File menu in an article editor window.
Select the revision to view
From the Article Revisions window you can select a previous version of the article to view.
The Revision Viewer opens
The article will open in a window that allows you to view and copy content but not edit it.
You can view other revisions using the revision menu.