PNG
An image file that keeps every pixel exactly and can hold see-through areas.
See it in FX engine. Make a picture, then press Save PNG under Export.
In plain words
PNG is a picture file that loses nothing. It packs pixels by writing repeats briefly, then unpacks them to the exact same values. It can also keep alpha, so parts of the picture can be see-through. That makes it good for drawings, screenshots, logos and pixel art. For photos, PNG files are often much larger than JPEG.