Is there any way to remove breathing marks from the Greek texts of the Bible in Logos Bible Software without having to use the Textus Receptus? Also how does one remove the cantillation marks from the BHS?
You can't "remove" marks from the text of a bible but you can ignore marks in a Search e.g. μαρτυρια or μαρτυρία will be found in any GNT by default.In Hebrew you might have to use match.nomarks:
Is there a Greek Bible that does not have breathing marks?
WH1881MR is probably closest to a critical text w/out marks. (Westcott and Hort Greek New Testament (1881) with Morphology)