19.28Transpose immediately

Suppose you found:

3 3 4 5 | 5 4 3 2 | 1

in C:

E E F G | G F E D | C

Now play in G:

B B C D | D C B A | G

Then F:

A A B♭ C | C B♭ A G | F

This confirms you learned the melody as relationships, not finger memory.