They are showing the image. Did you read the post? There's no attribution, you wouldn't know at first glance it came from his website. Even the shortcut is only

They are showing the image. Did you read the post? There's no attribution, you wouldn't know at first glance it came from his website. Even the shortcut is only called "Guitar Chord Finder" and never mentions his website. You need to edit the shortcut to find it.