change Zimbra calendar printing font size

[mocart]

Hi everybody,
i want to use smaller font size in Zimbra calendar printing, if i print my week tasks it consist two A4 format pages, and, a want to it one page, i think it can if i do smaller font size in this file:
/opt/zimbra/jetty-6.1.22.z6/webapps/zimbra/h/printcalendar
but there used CSS system, who can help me? where is this CSS file, and where i can modify font size?

[bdial]

usually in the print preview window that comes up when you hit print, you can hold ctrl and press -/+ and shrink or grow the font. and it will remember that setting ususally