Hi, 
This is my first post here, I've been around for a while. I'm part-time professional translator (I use Trados) and part-time MA translation student. 
I've currently been experiment for uni with the interplay between some of the more complex file formats and the preview window. 
I had an issue in a couple of my files with how the information was displayed, or the preview panel freezing. It did not affect the final translation, just the process of how I got there.
I'm wondering if there is anywhere I can find information on how the preview window in Trados functions. 
(I particular like the .html to doc features) but need to try and understand a little how the preview function works and have some source of info to be able to quote in my work. 

Many thanks in advance
H