Step 6 - Select slide Two. Repeat the procedure to create a button to the next slide. Make this button act also on a mouse click, just like the first one you made. Also create a button in the bottom left corner of slide Two to go back to the first slide. Look at the image with step 3. The back button is to the left of the button outlined by the purple square. For this button, select the Mouse Over tab. Read the pop-up window carefully. Even though you have chosen the Back button, you must select Previous Slide from the pull down menu.
The earliest version of PowerPoint (1987 for Macintosh) could be used to print black and white pages to be photocopied onto sheets of transparent film for projection from overhead projectors , and to print speaker's notes and audience handouts; the next version (1988 for Macintosh, 1990 for Windows) was extended to also produce color 35mm slides by communicating a file over a modem to a Genigraphics imaging center with slides returned by overnight delivery for projection from slide projectors . PowerPoint was used for planning and preparing a presentation, but not for delivering it (apart from previewing it on a computer screen, or distributing printed paper copies).  The operation of PowerPoint changed substantially in its third version (1992 for Windows and Macintosh), when PowerPoint was extended to also deliver a presentation by producing direct video output to digital projectors or large monitors.  In 1992 video projection of presentations was rare and expensive, and practically unknown from a laptop computer. Robert Gaskins, one of the creators of PowerPoint, says he publicly demonstrated that use for the first time at a large Microsoft meeting held in Paris on February 25, 1992, by using an unreleased development build of PowerPoint running on an early pre-production sample of a powerful new color laptop and feeding a professional auditorium video projector .  (pp373–375)