[r00fus]

I dunno, if you click [map] on one of the argdown examples, it interactively flips to the diagram of said syntax.

I didn't find that too difficult to discover. It even seemed more interactive.

[pas]

True, but most people won't click on map.

[Tepix]

I did :-)

[_fqqr]

It is a great picture to show its cabalities, the front-page examples are quite simple.

[vorpalhex]

I entirely missed that button and came all the way back to HN comments to find screenshots..