Now an aid is available on-line, for all those who wish to see how a chord or a particular scale is made up: talking about the applet Virtual Piano Chords.
How does it work? Just click on the tone (root) and then click either CHORDS or SCALE. In fact, it depends on what you want to display, whether the chord or the scale. There is an infinity available, the whole standard and some more.
Besides, on the right hand, you can insert the note sequence. They will magically appear on the keyboard.
Just glance, you can benefit from it. Follow the link http://nfo.net/MFILE/ . Enjoy!