disp — displays variables
disp(x1,[x2,...xn])
displays xi with the current format. xi's are arbitrary
objects (matrices of constants, strings, functions, lists, ...)
Display of objects defined by tlist may be overloaded by the
definition of a function. This function must have no output argument a
single input argument ant it's name is formed as follow
%<tlist_type>_p where %<tlist_type> stands for the first
entry of the tlist type component.
The lines function may be used to control the ouput.