Transfer the system into real keys
Now hand signs, syllables, degrees and actual note names are combined. Remember: movable Do is always the first degree of the chosen major key, so the concrete notes change while their functions remain.
Do can begin on different notes
C is Do in C major, F is Do in F major, and G is Do in G major. From each new Do, the same sequence of degrees and syllables begins.
C major
C = Do
F major
F = Do
G major
G = Do