The On-line version links take you to versions appropriate for viewing on your computer screen. You advance through the slides via the arrows and one of the two pop-up menus at the lower left-hand side of the screen. The other pop-up menu there, the Actions menu allows you to download the show in various formats. The Printable version links are versions that are easier to print out on paper once you download them as PDF files. Print these files out with your printer set to Landscape mode but your paper fed in the regular way.