Octave marker

The clef at beginning of each line is substituted by a number inside a small circle: the octave marker. The octave marker indicates in which octave is
the drawn note. In the next example the note C on each of the seven octaves is represented with the corresponding key in the piano keyboard:

As you can see, the position of C is always the same regardless of the octave.
Though one could use all seven markers for each one of the existing octaves, usually only these two ones are used: and Which correspond to the traditional notation of treble  and bass .

The staff in the Leszer notation has four instead of five lines and its composed of two thick lines and two thin lines. The  thick lines are the F-lines: a note over one thick line is always an F. The thin lines are the C-lines: a note resting over he inferior thin line of a group of two thin lines is always a C.

This is a comparison between the traditional notation (Figure 1) and the leszer notation (Figure 2).

Note how the relative position of the notes does not depend anymore on the clef.