How can we Set the Time for Slide Show?
https://www.computersprofessor.com/2016/05/how-can-we-set-time-for-slide-show.html
The following steps are followed for setting time for slide show:
1.
Choose view → slide show.
2.
Pick Rehearse New Timings from the advance options.
3.
Click the show button. A little clock / button appear in the lower – left
corner of the screen.
4.
When the current slide’s been on screen long enough, click the clock / button
to advance to the next one.
5.
Continue this way through entire show. At the end of the show, Power Point will
tell you the total running time and ask if you want to save the timings.