I installed the freeware utility Grabber2k about ten years ago. It remains the most flexible, yet simple to use screen capture program I've examined...
...and I've looked at most of 'em that've been released; well over one hundred so far.
It will capture an unlimited number of images, and save in any one of ten different formats, from .bmp, .jpg, .png, etc. It will capture a single screen, multiple monitors, or any selected portion of a screen, with or without cursor...
With a memory 'footprint' of less than 2k, I let it load when the computer boots, so it's always available when needed...
...since I have it assigned to the "Print Screen" key, it's totally automatic and unobtrusive. :typing: