Hi Tirta
I'm losing the top of the message box too, and am not sure there is a fix. They seem mostly useful in the training missions, only. I didn't see one in the Tiger mission reported over at CA, and just saw one or two in the Sherman mission.

SimHQ Battle of Britain II screenshots thread
CombatAce Mission Reports
"Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth." (attributed to Marcus Aurelius)