On Sun, Mar 09, 2014 at 10:58:35AM +0000, Dave F. wrote: > Are you aware there's a separate wiki page for 'Layer'? No wonder > users get confused! yes, this is a problem. There are other meanings of layer so this page probably has to stay at least as a disambiguator. But yes, I am very much in favor of avoiding as much of the duplication as possible. Richard