Talks are often supported by presentations via a projector (with a presentation program such as Powerpoint). During the talk, there is often a sentence like "next slide/foil/screen please" or "on this slide/foil you see [...]".
In the past there were two techniques:
- output on transparency/foils and presentation via an overhead projector
- output on slides (Reversal film) and presentation via a slide projector
In my experience, most presenters use slide in their talks, but some use foil. LaTeX-based presentation tools use also slide and foil.
I have the impression that British speakers prefer foil, and American ones prefer slides.
Is there any rule or is it an individual preference? Or should I use screen like Next screen please?