Matthias, do you have any reference for this? Is this documented behavior? Is it special to TexShop, or general to LaTeX?

I'll try to work it into the syntax, since it doesn't break any other behavior.
On Jan 25, 2006, at 12:20 PM, Matthias Damm wrote:

TeXShop has an analog method to display the structure of the document, but there also lines beginning with "%:" are displayed.