<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>I have been using xy-pic for a while now, in papers, <br>and i was very satisfied. It happened however this week that i had to<br>give a talk in which i wanted to reuse some of the drawing i had made<br>using xy in the papers. It worked fine, with a major exception: <br>the head of all the arrows is tiny, and almost invisible on the<br>screen. So people in the audience could see the lines of the arrows<br>i had, but could not see which direction the arrow was going (i am<br>using simple arrows of the form ->). <br>Can somebody tell me how to make the head larger? <br>I need it urgently, as i have to give a talk tomorrow.<br>Thanks,<br>Bruno<br></div></div></body></html>