I am trying to make something like a collage of several dozen pictures (about a hundred) and I'd like for all of the small pictures to have an exactly the same size, for them to look like they make up a single image. You know like those face collages made from a bunch of random pictures. What would really make my work easier is a tool to automatically resize each new picture to the same standard size, in the bottom of paint.net menu I can see the size of a picture I am resizing (bounding rectangle size), but I can't find an option for me to enter exactly the same proportions for all of my pictures.
As I said, I am working with probably a hundred or so pictures and dragging with the mouse, finding the proper size by eye, to fit the same size is a chore. Is there like a menu, or something, where I can enter the size in numbers for each consecutive layer (picture?) in numbers?