how to keep messages in chat log?

a simple question: how do i have to use the -Display text-(or something similar) action to have everything i send stored in the chat log?

edit: everything i send with the action 'Game- Display to.. '

hmm... well there is already a provided log... but if you want you could try this... (opens we, and tinkers around)

i will post the map or something when im done

i appreciate your help and i mean the ingame-chat log.