Bulk select images to make private

It is very time consuming to click images one by one to make private. Private should be the default setting and we click to make public if we want..... or....be able to bulk select images and have the 'make private' button in the same screen to click after selecting images. I intent to sell my images that I produce so I don't want them to be automatically public. It is too time consuming, that part of the program is slow...