??=[entries.style]
As mentioned above, the entries of a diagram are set in math mode in
text style. You may change this by redefinining the macro
||, and the label style by redefining ||. We
can combine this with the above to get `small diagrams', , typing
in a paragraph will typeset ``''.
You can even abandon the use of math mode entirely: the command
|| will change the format of entries to
plain text.
With the "v3" matrix command the style and shape of individual
entries can be changed.