You can do much more with paint.net than with Paint. You can add layers, adjust colors or remove certain areas of the image ...

Many images and graphics, however, come in a PNG format — most notably screenshots. Luckily, with the Preview program that comes with your Mac computer you can convert a PNG to a JPEG.

In the early days of personal computing, there were so many incompatible file formats that one of the first programs many PC users purchased ... taking the PNG image file format and turning ...