signification of the hat of corps commanders

[thilio]

Minor questions about the hat of corps commanders which sometimes disappear (or is darker in F7).
Can someone tell me the meaning of that?
I have the same question for the blood on the hat of individual units in F7.
Thanks in advance   

[JMM]

Sorry for the delay

Hat / Regiment:
Displayed : AI is fully active,
Hidden : AI is disabled;  however, in this case, AI continues to take care the units; for example, it is able to form the square.

Hat / Corps:
Displayed : AI is fully active,
Hidden : the CinC has to order the halt/resume for the Corps; AI is able to stop the movement of Corps if the threat seems too heavy.

Red marker on the hat... The unit is bombarded.

JMM

[thilio]

Thanks a lot