Implementing attachable shapes in OpenType  Angus R Shamal's
picture  Hello everyone,  First time poster here, hopefully you
can help me with something.  I've recently opened an older
Typeface I designed back in 2004 (ARS Robust) in order to take
another swing in implementing a feature that is essential to the
character of the Typeface, before I officially release it.  The
design integrates two types of attachable shapes (serifs) that
in combination with the letter forms can create custom ligatures
or aesthetic modifications to the letters or spacing at will,
chosen by the user/designer. The system i came up with so far is
placing each form in different places with different key
combination. I'm not sure this is a very user-friendly system,
do you? I'm trying to solve this maybe with OpenType coding or
something like that.  I've attached a pic of the font/feature so
you can see what I mean.  The issue is applying a single shape
or several at a time to a character either at the top left or
bottom right or both