In Logos 3, the original New American Standard Bible (1977) had tags for Greek/Hebrew words. I also could use Navigate to Associated Word, to find the corresponding word in the Nestle-Aland Greek New Testament. When I open the NASB77 in Logos 4, all of the tagging information is lost and there is no Sympathetic Highlighting option (equivalent to Navigate to Associated Word in Logos 3). I am disappointed that Logos 4 does not give me the same access to information with this resource that I had in Logos 3.