1. Hello. After WotLK release there is a trend of yellow messages in the center of the screen (such as declarations to the raid - with another sound). Can you advise a feature (function or so) that makes this message?

    P.S. Sorry, I know English very bad.

    Sure, that's the new RaidNotice functionality. You can use it in the following way:

     /run RaidNotice_AddMessage(RaidBossEmoteFrame, "Hello World!", ChatTypeInfo["RAID_BOSS_EMOTE"])
    

    Instead of RAID_BOSS_EMOTE you can use RAID_WARNING.