Used primarily in the context of photography or image processing. In photography class, we learned how to use an enlarger.
Pro Tip 2/3
Darkroom Equipment
Refers to equipment found in a darkroom where photographs are traditionally developed. He turned off the lights and prepared the enlarger for printing photos.
Pro Tip 3/3
Not for Zooming
An enlarger does not zoom in on details; it increases the overall size of an image. The picture's details were lost when I just zoomed in, so I had to use an enlarger.