Pagyra. PNG will not appear. because it's will be un-readed.
Nope, my mistake. You can have all of formats in CS2D but CS2D set pink color as transparent in .BMP file. PNG support a transparent but not as pink color, but transparent in image.
Well i suggest you to use a rogram that supports layering. Why? You will create your files faster and its more user friendly. With a simple paint tool (ms paint for example) you will need at least 4times longer to create the same file.