I purchased Logos 9, Professional Academic SO THAT i could enter any grammatical term, e.g., "aorist imperative" and quickly access pertinent articles in all my grammars. Guess what? you can't do that! Seems no grammar resource is indexed "grammar" so that others in my library show up in the parallel resources. I spent $1,075 for that very feature. (Your salesman didn't lie; didn't know for sure, and I risked it.) If all lexicons show up as parallel resources for any one, why cannot all grammars show up as parallels for any one? Amazing!