Your original version is replaced by the changed version. The original version is safe on the disk and won't change until you save the file again. Either type or select the filename you want to open. Works switches to the appropriate tool. The file is open and ready to be worked on.
Works lists all open files in the Window menu.
Choose the file you want to switch to. Works switches to the appropriate tool. The file is open and ready to be worked on. If there isn't a topic for the command or dialog box you're using, Works displays a message saying there is no Help available. From the Help menu, choose the Table of Contents command.