<posted & mailed> Paul A. Rubin wrote: > FWIW, I pasted your three arrow code into a new document in LyX (with > \usepackage[all]{xy} in the preamble), and instant preview displayed it > with three arrow heads but only one arrow (the middle one). I also > threw in another math inset with an integral, and instant preview did > not display the integral sign.
Now evrything works, thank you It seems that sometimes displaying xy-pic pictures takes a very long time; but i cannot reproduce. (by the way, i am still using 1.4.5 on linux) --P