I took the following document as a source: http://wiki.contextgarden.net/images/b/b4/Mathalign.pdf (Btw: Aditya, why isn't the latest version also on http://dl.contextgarden.net/myway/mathalign.pdf?) Section 4.2 says one thing and does the other ... I want to have my equations numbered as a_1 = (1,0,0) (1a) a_2 = (0,1,0) (1b) a_3 = (0,0,1) (1c) and then reference them as equation (1). The example from Aditya's document says the following: \placesubformula \startformula \startalign \NC a_1 x + b_1 y \NC = c_1 \NR[+][a] \NC a_2 x + b_2 y \NC = c_2 \NR[+][b] \stopalign \stopformula But if I try that in MKII, I get (0a) and (0b), while if I try that in MKIV, I get (1) and (2). How do I get (1a) and (1b) with both MKII and MKIV? Mojca (I'm asking about MKII since I have a completely different problem with every new MKIV version released and I really need to finish that document even if MKIV crashes or a nuclear war starts ... :) :) :)