> > Lyx inserts > > > > \usepackage[usenames]{color} > > this is superfluous, beamer loads by default xcolor. > Options to xcolor can be passed via the class options > Layout->Document->Layout->Options
So \usepackage{color} should not be inserted at all. I tried to add options "pdftex,usenames" for beamer but still get the 'option clash for package color' error message. Maybe something like ProvidesColor should be added to beamer.layout? Bo