About the frame counter

After the film is loaded, next thing to do is setting the frame counter.
Open the film counting window by raising the projection on the rear cover.
Then, looking through the film counting window, wind the film till the number "1" on the leading paper comes out in the window.
Here, set the frame counter to "0" and close the film counting window.

Fianlly, put off the focusing screen that is on the camera and put on the film back instead.