Hi Tuan,
Please disregard my request to change font sizes etc.
I have managed to do that by changing my template.css file (heading sizes for H1, H2, H3) and a few margin spacings in the EDocman style.css file.
Used Firebug (Firefox extension) to work out which files needed changing.
originally I was trying to change just the EDocman style.css file, but that alone did not change much.
The styles in EDocman are mainly set by the website template - Header (H1, H2, H3) tags.
Thanks anyway.