Is there a presentation application that allows you to display two photos, zoom in and out of each independently, moving one or the other along a filmstrip, similar to Lightroom Compare View? Powerpoint can do none of those features.
Have you tried Adobe Bridge?
In Photoshop, there are a few options that come to mind.
Many thanks Myra for these ingenious solutions. I suspect I need something simpler to present photos in front of a live audience. Since this is a common requirement among lecturers of visual art, I'm surprised Adobe does not offer one. Powerpoint and Keynote assume business users.
Lightroom Classic will do this, with or without a filmstrip, and with metadata of your choice, or without metadata.
You cannot zoom in on just one image, both images will be zoomed.
In case you're not familiar with LrC, it's a database program, and requires images to be imported before you can work with them.
I prefer a white background, but you can also choose between four shades of grey plus black.
I agree with Jane, Bridge will be a great solution for your requirements
you can change the workspace to filmstrip and also you can export to pdf presentation in the output module