The four most recently opened or closed charts, Smart Charts, or layouts are displayed at the bottom of the File menu.
To open one, you can either click it with the mouse, highlight it and press ENTER, or choose the number (with the File menu displayed) that corresponds to the one you want to open.
An expanded list of your most recently opened items is available in the Open dialog by choosing the History shortcut (see Open Dialog).
You can also create a list of favorite charts, Smart Charts, layouts, and folders which is accessed in the Open dialog by choosing the Favorites shortcut (see Open Dialog).