Use only single dictionary in reader

I would like to use the file reader to study some classical texts. I would like to restrict the lookup to the SCM dictionary. I know I can scroll thru the dictionaries to find the SCM entry but in many cases two adjacent characters form a modern word and there seems to be no way to get to the SCM dictionary nor any easy way to select the the individual characters if the set of them are defined in some dictionary. Is there any way other than removing all dictionaries except the the SCM from the device to get get just the SCM entry popped up?