##Label formatting
##label format subscript font size large small superscript bold newline
##Format escapes: \_ is subscript, \+ is normal font, \- is small font, \^ is superscript.
->Client: Hit\_1;
Client<->Server-Backend: Request\_1\+ with reply;
->Client: Hit\_2;
Client->Backend: Request\_2\-\nParameter=\b2;
Client<-Backend: Reponse
                 \-May contain an error;
