You have to open MS PowerPoint and make your stuff there. Don't do it in InDesign, makes no sense.
I’m sorry, but that is absolutely insane.
If you’re doing a Powerpoint presentation then do it in Powerpoint.
Screens are not determined by cm, but by pixels.
Use not print but web as target, and you can set the width and height according to your screen.
Have to make a powerpoint presentation.
Trying to set it up in indesign and plan to move it as a pdf across.
That won't be a Powerpoint presentation; it will be pictures of InDesign pages displayed on Powerpoint slides.
I do not know what are doing in Indesign for your powerpoint presentation but let me tell you the screen size
width: 25.4 cm
Height: 19.05 cm
just do presentation in InDesign and publish as an interactive PDF. PowerPoint is unnecessary in this chain.
You can set animation/timing and some page transitions directly in InDesign. And this PDF will be equal on all PCs where you do presentation if you will be use Adobe Reader/Acrobat for open PDF.
Powerpoint more helpful only for people who wanna more types of page transition and who wanna bugs on different PC. If you know InDesign - do it in it.
Bugs on different PCs? What exactly is that supposed to mean?
Powerpoint is the right tool for presentations.
I know what I say, thousands of vendors webinars that I visit, 500+ offline seminars, real work with ppt, etc show me many time bugs of screening elements of the pages. User in 99,999999% will not see this with PDF. Yes, you can correct ppt to view you construct firstly, but I prefer to do in InDesign that works.
Having worked with both Powerpoint and PDF for almost 2 decades now, I can respect a decision to use InDesign-to-PDF for presentation slides—your own presentation slides, if you so choose. But, that choice is made typically due to an aversion to working in Powerpoint, rather than any sort of mythical "bugs." In fact, given the multitude of possible PDF origins, recipes, and viewers, along with the potential rendering pitfalls added when transparency is introduced, I'd contend that Powerpoint and the Powerpoint Viewer constitute a considerably more reliable screen content rendering/viewing platform than does PDF.
And, if a client hires the design of a Powerpoint deck, then delivery of a PDF is surely a disservice.