Drawing is ok, but you need otg data to enjoy the conversion line. The conversion line is plugged into the computer, provided that your computer is equipped with various retouching software. And then carry out image processing. Generally, wedding photo studios shoot with SLR, and then retouch the pictures from the computer. But it's impossible to retouch the picture by camera alone, so it's of little use to adjust the color unless you are a professional camera player.