How do you change keys in noteflight?
Your key signature is written in Eb, but your music is still sounding in C since the change key signature function doesn't move any of the notes in Noteflight. In order to get the correct notes in Eb, simply select the entire passage, then hold down the shift key and press the up arrow three times.
How do you transpose scales?
To transpose a piece of music, you then play the corresponding note in the new scale. For instance, if the piece is in C major and you wish to transpose it to F major, you would recognize C as the first note in the C major scale and play F instead since it is the first note in F major. But learn all your scales first!