[Xy-pic] A newbbie Question

Henning Makholm henning at makholm.net
Wed Dec 10 15:42:52 CET 2003

```Scripsit Mansour Al-Aqeel

> I'm trying to figure out how to style an arrow. For some reason, I'm
> getting an error when ever I use @.

When trying to get help with errors, always quote the exact error
message you're getting. Otherwise it is hard or impossible to provide
useful help.

> and after I deleted  @-1pc, it became
> \xymatrix  { A\ar@{=>}[d] \\ B }

> still not getiing what i want.

Does it help if you insert a space between \ar and @? If so, you have
a problem with your catcodes. Do you use @ for anything else than