II Electronic Signature of Your Work
Double-click on the “PKZIP for Windows” icon in order to run the program.
Then - using the mouse - drag and drop your file into the PKZIP window.
The computer asks you a name for the file that you're going to "zip",
(you may keep the same name)
then PKZIP is compressing your file.
(the result of this compression is the electronic signature or key)