As you open part and sheet files, the File menu lists the corresponding file names above the Exit option. The last six files that were loaded are listed.
Instead of selecting the Open option and navigating the Open File dialog box, you can more easily open parts and sheets by selecting their file names directly from the File menu.
You can open the part or sheet by selecting the name with the mouse pointer, or by using an <Alt> + Number keystroke combination. Each previously opened file on the menu has an underlined number to the left of it. For example, to open the first file listed on the menu, you would press <Alt> + <F> to open the File menu, then press <1> to open that part or sheet file having an underlined 1 next to its name.