This is the first window that opens when you start ACT.
If you select this menu item a file requester will be displayed which allows you to open two sequence files and a file containing the results of a comparison. If the files you select are successfully read a new window will open, which shows the sequences and the comparison. See Chapter 3 to find out how to use the main window. The comparison file is described in see the section called The Comparison File Format.
This menu item will close all windows and then exit the program