I Want My Image To Display Actual Size (example 3840 pixel x 2160 pixels). How Do I Do This?

I want to display my photographs one at a time. The default display setting displays them too small.

I cannot find in the settings a way to display my image at a preferred size. If my image is 3840 pixels x 2160 pixels, I want it displayed that size on a modern 4K computer display.

How can I do this?

As was being discussed in your previous question, they will need to be resized since most people do not have a 4K monitor. You could probably add some code to force them to be displayed at that resolution but it would break on any smaller screen.

Besides that the files size for a gallery of images would be massive. If you are looking to use this for proofs you should just send them a link to download file.