Hi,using LyX 1.6.4 on Win Vista the tutorial on xypic does not show the examples porperly on my machine: only arrwos without any arrowheads are displayed in instant preview, any other entries are simply ignored.
I have checked in a new document with "\usepackage[all]{xy}" in the preamble that the instant preview feature works perfectly fine.
I think if this could be amended the feature will be more more used. Best wishes,J.
