If a Greek word is only found in the LXX but not the Greek New Testament, you cannot enter lemma: in the search box and then select the Greek word from the pick list. As a result you have to actually type the Greek word. For example, you cannot enter lemma:sabbatizw and have σαββατίζω appear in the pick list. The Greek pick list seems to only include New Testament Greek words. I don't know if the pick list for Greek words also includes words in Philo, Apostolic Fathers and other morphologically tagged Greek texts, but that would be what I would expect.
I would not mind so much if I could enter lemma:sabbatizw and have the search work based on the transliteration rules that the program uses for the pick lists. But as it is, we have to either type in Greek or rely on the pick lists.
