The \titleformat command is always used in conjunction with the \subheaddformat
command and will set options for the subheadd titles. The format for the
\titleformat command is:
This is the default for \titleformat. Each \subheadd command will start a new
paragraph, print the \subheaddtitle in italics followed by a colon and then
resume with the text.
For more information on the \subheaddtitle command, see the help screen under
the markup menu for that particular command.