A /cls command in chat

[Kapoios]

Could we have a /cls command (/clear or whatever you call it) command in chat? I've often found myself logged in to chat for several hours and wanting to see something said earlier, but since things never die, it's a pain to scroll back when it becomes big. It would be nice if I could occassionally clear my screen. I think that would be from harmless to very helpful to people and hopefully not a pain to implement.

EDIT: My fellow chatters have just informed me that F5 works equally well to /cls,  and that you can set your max message capacity in the options. So never mind about this. I should be less hasty in posting :)