What do you use to generate these class diagrams?
All the UML tools I've tried take an age to manually reformat/resize the boxes
on automatically generated diagrams. :-(
Which is why I never really got into UML, too much faff
I use Dia on Windows. I think it is good for Linux too. It is no frills/bells/whistles to draw diagrams(not just UML). Sufficient to get the message across and the work done.
Here is one I drew.
Dia on Windows: http://dia-installer.sourceforge.net/
It should also be in Linux distros.