What are these icons called?

[Thunk]

Hi,

What are these red boxes called next to some, but not all, ground groups called? I've failed to find anything useful on google.  I'd like to understand why they appear sometimes and how to make them go away.

Thanks!

null

[rob10]

They are telling you that the unit is beyond limits side to side (6 degrees rather than max 5 degrees) but within limits front to back (1 degree vs max 5 degrees).  So you need to place it on leveller ground for it to be able to be functional.

[Thunk]

Aha! Now it all makes sense.

Thanks!