I'd like to write natural transformation arrows in LyX (18.104.22.168) using
2cell (see this answer). The problem is, LyX seems to include the xy package by default and it's only using the
[all] option. I can't find a way to change the options or disable the package alltogether, and if I use the
xy package with the
[all,2cell] options in the document preamble I get complaints about loading the package twice. Is there a (nice) way around this?
EDIT: As pointed out in the comments, LyX adds the
xy package automatically when I use
\xymatrix in the document. Can this be disabled or can I change which options are used for the package?