I'm a little confuse by the box shading of the altitude bug. Usually, the bug is cyan when I'm within 200 of my altitude which I understand. What is the magenta box around it mean? Does it have to do with navigating by GPS? Also, there was one time when the magenta box separated from the cyan box, i.e., when I changed the altitude bug, the magenta box stayed were it was as I increased the settings. After a while, it just popped back on the bug.
The more I fly, the more a see how much I need to learn.