controlling psql's use of the pager a bit more

I often get annoyed because psql is a bit too aggressive when it decides 
whether to put output through the pager, and the only way to avoid this 
is to turn the pager off (in which case your next query might dump many 
thousands of lines to the screen). I'd like a way to be able to specify 
a minumum number of lines of output before psql would invoke the pager, 
rather than just always using the terminal window size.

Thoughts?

cheers

andrew