Special characters like stars, hands, arrows, and geometric shapes you can use to decorate a document. A collection of dingbats is found in a popular font called Wingdings.

 _  _ _  _  
(_|| | |(_|><
 _|   

It took a while before i realised what they are, and how they're used over here. I was afraid for wingdings characters or images, but the single characters are no problem for me.

Are there rules for dingbats in node titles? (written or implicitly assumed?)

++ vs lbh qrpbqrq guvf hfvat n ge va Crey :)
Nabgure bar vs lbh qvq fb jvgubhg ernqvat n znahny svefg.
-- vs lbh hfrq OFQ pnrfne ;)
    - Whreq