Move order screen displays only move orders created by a user

Hi community,

I looking for the way to allow the "Find move order " selection screen to allow to get every available move order created by everybody.

In that search screen, there is a "Created by" parameter which is set automatically to my user and as it is protected, I can't blank it to enlarge my scope of search.

Someone knows the way to unprotect that search field in the window allowing to select a different user than mine or even more as being able to blank it?

Thanks folks for help.