Acch. Sorry for the noise. It should be \definefallbackfamily[mainface][serif][Scheherazade][range=0600-077F, features=arabic] Alan On Fri, Feb 5, 2016 at 6:28 AM, Alan Bowen wrote:

currently have:

\definefontfeature [arabic] [mode=node,language=dflt,script=arab, init=yes,medi=yes,fina=yes,isol=yes, liga=yes,dlig=yes,rlig=yes,tlig=yes, calt=yes,trep=yes,mark=yes,mkmk=yes, kern=yes,curs=yes]

\definefallbackfamily[mainface][serif][Scheherazade][range=0600-077F][features=arabic]

and get output in which the letters are not joined up into words but printed separately, as in

ثم يتعرف وزن ما يحتاج اليه مع وزن الكفة لموازاة الافق بالعمود Is there a setting that I have missed?

Alan