[Xy-pic] Change the orientation of Arrow of xtwocell

Michael Barr barr at math.mcgill.ca
Sun Aug 25 15:40:47 CEST 2013

I don't know in native xy-pic, but if you use diagxy (a front end to 
xy-pic), it is pretty easy:
seems to do just what you wanted.  Diagxy (including a tutorial) is 
avaiable from CTAN.

Michael Barr

The modern conservative is engaged in one of man's oldest exercises in
moral philosophy--the search for a superior moral justification
for selfishness.  --J.K. Galbraith

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