First the photos had to be cleaned by sticking the negative in the Photoflow for 20 seconds and then carefully washing it off. Then you take the negative, slide it ito the tray, and load the tray into the enlarger. After focusing the image with your eye, you have have to use a grain focuser which focuses the image as much as it possibly can. Then you rip a sheet of photo paper to create a test strip, you try 4 different exposure times to see which looks the best. You take what you learned from the test strip and apply it to the real photo then develop it.