Why can't there be a nice simple way of printing part of the tree or exporting to a PDF or image file?

I don't want to have to pay a large amount to receive a professionally printed copy weeks later but I often want to be able to show a part of the tree to someone - the whole tree is much too big to print.

I do this all the time on the master copy of my tree which is held on my computer so why cannot it be done with the Ancestry tree?

MB