PowerPoint is printed in handout mode, usually this way:
As shown above, it is a vertical typesetting of six slides.
But sometimes there are six slides in the horizontal layout, as shown in the following illustration:
So how do you turn it into a vertical typesetting, in fact, the mystery is in between two buttons, first in the PPT toolbar open "Print Preview", see Two A, (Red arrow refers to the point) one is horizontal, one is longitudinal, choose Portrait, that is, vertical typesetting six films. As shown in the following illustration:
Similarly, in print preview, you can also choose to print four or six films on the same page, as shown in the Red oval below:
For example, I choose "handouts (4 slides per page)" which is the following effect: