I hope my varied color scheme, did not have anything to do with this.
No implied or actual hostility intended, and certainly no offense taken. [Why do many BB posters see hostility, where there is none, for there are certainly enough instances where I do see such, especially in certain areas?? Just wonderin'! (I could start with "kicking b*#t, and taking names" if someone would like.)

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And in no way am I offended by your signature I assure you. I was just pointing out the seeming contradiction, in the positions.
I have two objections to a "red letter" edition Bible, with (A.) the first being that it is a somewhat harder to read, just as you said, at least for me, for as a Type II diabetic, even though I see fairly well for one so afflicted. And at 60 yesterday, BTW, my vision is not as good as it once was, for "small stuff," either. A darker "blood red" print, not to mention larger font, would help greatly, but I don't seem to see that forthcoming, and I sure don't want to carry around any modern-day, 30#, "Great Bible" to begin with. (Incidentally, they once had to chain these Bibles to the pulpits, to keep them from "walking off", for even at 30#, they were somehow "getting legs" in the Word starved environment of that day.)
However, the second is my main objection. (B.) Whether or not this is intentional, the "Red Letter" editions have have the practical effect of negating II TIm. 3:16, which says "All Scripture is God-breathed-out, and is profitable...", by elevating these supposed actual quoted "Words of Jesus" above the rest of Scripture. In the first place, often we do not know whether or not the quotes are "direct quotes" or "indirect quotes." Jesus himself, while on the earth, wrote nothing we have recorded, at least. In the second place, the OT quotes of the LORD God are just as much a 'quote from God' as any words of Jesus, could have been. And in the third place, I believe God, the Holy Spirit, 'inspired' each and every Biblical writer in what words to use, consistent with the writer's own personality, with a very few exceptions, including "the BIG TEN", which were written by the hand of God, himself. John 3:16 and Ex. 20:1-3 are no more "inspired" by the Holy Spirit, (nor are they any less so), than are the words due to the historical research of Luke, in Acts, than are the words of Luke in Acts, in which he was a participant, than are the words of the unknown writers of Hebrews and Chronicles. Nor is Ps. 117 any less important than is Ps. 119, considering that they are the shortest and longest chapters, respectively in the English Bibles to which most of us have access.
Have I already said enough that is entirely orthodox, that you would recommend me for teaching a class in Bibliology at your school, sometime?
Ed