> Thanks, I know this. I sometimes use the free viewer from TGLC: > > http://www.tglc.com/english/ > > which is available for Win and OS X. As a bonus you can specify color > coordinates. > > Best regards > Peter Although I kind of like the Win applet because of its inherent ties with the OS and when teaching to my students, they relate to is more 'naturally' because it has Bill Gates's name on it. Roger Breton