Campaign and battle maps share key bindings
This is another feature/bug: it is not possible to bind the same key in both the campaign and battle maps to different functions although logically there is no reason key bindings have to be shared. This means e.g., I cannot use the F key on the campaign map to bring up the Financials scroll, and the F key in a battle to switch on fire at will.
It is possible to hack the key .dat file so that the same key works differently in campaign and battle - it is just the key binding user interface in RTW doesn't know this.
PS This feature has always been present in the game.