ok so a simple question i think (getting back into 3d after years doing a job and bored as heck)...

I am working on a knife model and am mostly done but am following a digital tutors guide. Simply, i turned on "shaded uvs" to see if I have flipped, overlapping etc faces and yes I do. So I select the faces which appear as red and bad in the editor and reverse them. Now they're black but in the editor they're blue which is good.

https://imgur.com/a/zNiAkHz

what is going on here?

ps nice to see the community is still active

https://imgur.com/a/zNiAkHz