Oh! Right !,

I forgot the half step and whole step formula,

So when we transpose we should consider the half step and whole step.

Ok then to transpose from the key B to F

According to Major scale formula

W W h W W W h

[br]B-C,One whole step = C#

C#m- D, one whole step = D#

D#- E, one half step = E

E- F, one half step = F

Therefore, transposing a song from the key B to F is 6 half steps

For instance, if a song in the key of B an has an intro as follows:

B/ E/B/ E

A#m / E / B /E

Verse:

F#/ G#m/ F# / G#m

E / G#m / E / G#m

After transposing to F (by 6 half steps)

Intro:

F/ A#m/ F/A#m

E /A#m/ F / A#m

Verse :

C/ D/C/D

A#m/ D/ A#m/ D

I just created the song in both B and F please examine the intro and verse by appling all the music theory in both keys and let me know if I have made any mistake.

Thank u very much for ur supports

-charles