The editor has lots of options including all the symbols and graphics that belong to the musical language that you can insert in the central grid.
You can play what you have written at all times to see if it fits the melody you wanted to produce.
Furthermore, you can insert the lyrics on the same score if the song happens to have them. The score can also be printed so you have it on paper.
Producing your own melodies and obtaining the scores is now free and easy!