A lot of times, when referring to an interval, people will refer to it as a Number instead of the actual note.
The example is that A B C# D E F# can be written as 1 2 3 4 5 6. This is effective because it easily allows you to change keys and transpose. 1 2 3 4 5 6 in the key of D would be D E F# G A B. So I transcribe the notes and show you how its’ done with this post. Check it out!
The program I’m using is called Sibelius – check out Sibelius 6