Put a shape on the board: click the frets, or type them as x32010, and it tells you what chord it is, and every other name it goes by. Number the fingers, title it, and save the diagram as a picture.
Add a note. Click an empty fret.
Edit a note. Click its dot to change the text, colour or shape, or remove it.
Low string first, x for one you do not play.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.