Max. number of slides or size recommended?

Hi Oky. Thanks for your query. The only limit on the number of slides you can have in one presentation is the technical capabilities of your machine. You can put any number of slides with full scale video files and animation if you have enough RAM to cope with it, but you will still - sooner or later - encounter system problems as the computer struggles to cope with the material. You could have thousands of powerpoint slides with just bullet points on each slide, but while Powerpoint itself will allow you keep adding slides, the filesize will still keep growing until your system capabilities are exceeded.

Hope this helps!

Anthony