An icon for the Recent function is found at the top of the article window and the image window. For articles, 'Recent' displays a list of headlines of the articles you have previously looked at. For images, 'Recent' displays pages of thumbnail images, representing the photographs and graphics you have previously looked at. In either case, you can re-open the article or image by clicking on it in the Recent window.
However, in both cases, only the most recent 75 images or headlines are retained. You can use the 'Save session' command from the Tools menu if you want to store more than the 75 limit.