Notation will appear here when you enter some ABC.
Click Open to open an existing ABC or MusicXML file.
Click Add to add a new ABC tune or tune template.
Drag-and-drop an ABC or MusicXML file on the editor area to add it.
Not seeing the side-by-side ABC/Notation view?
Try zooming out your browser view by pressing:
Windows: Ctrl - Mac: ⌘ -