Thanks Warren but I usually save in the 97 -03 format as many of my students do not have the 07 version and cannot open .docx. I guess I should elabourate a little. I have a set of programs I bought (basically macros) which allowed me to easily write chemical equations and draw organic structures as well as mathematical equations, shapes, graphs and so on. These will not work on 07 and as I use them so much I will have to buy the new versions. My only other option is to use sub/super scripts and equation editor in word which is very time consumming.
Mark