What do the different compose options do?
Join is the operator for building conjunct consonants. It adds together the basic letters you have just typed. If you press join after a conjunct, where no further letters can be added, it splits up the conjunct into its constituent letters. Join Only only performs the first part of the ‘Join’ function (no splitting). Join2 just does ‘Join’ twice (for building three letter conjuncts). Link is an old-fashioned ‘join’ method explained above.
