I got in the car this morning and the 4x4 screen happend to be on because I was looking at it last night. Above the tires on the screen there are 4 white lines, well this morning the back rear line was flashing red. What does this mean? It went away after I started driving, actually I think it went away once the car got into normal height.

It means the suspension is at the maximum extension or your are flying a wheel offroad! I suspect that your suspension was on access mode so it was showning as being on the bumpstops!

If you have the locking diffs then you should watch the screen and see how often they work in slippery conditions - I was amazed when I took the Land Rover Experience's V8 with the locking centre and rear diffs out in the mud to see how often they engaged (they are automatic). On the 4x4 screen they are the padlock symbols and the change from green to red as they work. 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW