I am trying to display a large amount of photos in my slideshow so I want to display 2-4 images per slide. I cannot figure out how to do this. Thank you.
. . . . I want to display 2-4 images per slide . . . .
There are 2 ways of doing this:
Using the built in collages available under the template icon , Design, Collages - note the collage numbering indicates the number of images in the collage and the [^] or [>] indicate if the images are portrait or landscape.
Select the first image to be in the collage and then add the effect to it, the rest of the images used will be those immediately following the selected image.
Create your own using fx, View & Animation, Size & position and adjusting each image to fit as you require - for this you need to stack the required number of images underneath each other and work in Timeline mode
Method 2 is the more versatile because you can create any type of arrangement you require.
Is this a question about Photostory Deluxe, which is the forum area to which you have posted? If so, although this is theoretically possible in this software (using method 2 in @johnebaker's post above) it would be rather easier, I suspect, in a dedicated video editing package like Movie Edit Pro.