Some special TEXT commands have been added to allow drawing of alternative shapes etc. In fact this is how the HELIX, STRAND and COIL commands are implemented. The text commands are all prefixed by an @ symbol.
e.g. TEXT 3 6 ``@fuparrow''
will draw a filled up arrow at position 3,6.
The alternative text commands are:
@leftarrow - an open left pointing arrow.
@fleftarrow - a filled left pointing arrow.
@uparrow - an open up pointing arrow.
@fuparrow - a filled up pointing arrow.
@downarrow - an open down pointing arrow.
@fdownarrow - a filled down pointing arrow.
@circle - an open circle.
@fcircle - a filled circle.
I plan to make this option more flexible in the near future.