[support] Theme for printing

[Roger]

Hi
I am using Mayo theme with  an added css for overriding some positions 
of blocks.
I need to create a css for printing a calendar and news items without 
the Mayo header or footer and only in grey scale.

I am comfortable with css and the .info file but have no idea how to 
call a dedicated print.css when a user wants to print calendar or news 
item on plain white background.

Can someone please advise me.
thanks in advance
Roger