This is probably an over-asked quesiton, but...

[RootsKW]

How do you see the entire campaign minimap without trading map info?

[meese]

The only way is to reveal the entire map by opening the cheat console (~ on my keyboard) then typing toggle_fow to reveal the map and mini-map. Typing it again returns them to normal.

[RootsKW]

So it reveals the game map too?

[Mr. Tornado]

you'll ab able to see everything; try it. I mean EVERYTHING

[Mega Tortas de Bodemloze]

I highly recommend it not so much as a cheat but to see how the factions evolve and observe where certain opportunities lie. {Merchant acquisitions, rebel settlements, etc..}
.

[Concrete]

I highly recommend it not so much as a cheat but to see how the factions evolve and observe where certain opportunities lie. {Merchant acquisitions, rebel settlements, etc..}
.

I believe that it is better to keep it off, but I do agree with the reasons you posted for it.
I use it every decade or so.

[Ichon]

I never used it at all until lately just to watch the blobs form. I was really surprised to see Mongols lose over 80% of the regions they conquered to rebels. I also like aiding some factions on the verge of being wiped out and it is easier to see how well a faction is doing with fow off. For instance I gave Byz Constantinople, Athens, and Mythos when Hungary and Turks were killing them and then like to watch with fow off as they rebound and starting killing Hungary.

[JorisofHolland]

I sometimes use it to make up for flaws - no wait, wrong word, should be: bugs in the engine. (Princesses spring to mind)

[bɑne]

Princesses spring to mind

Princesshunting is a really annoying aspect if done legitimatly. Wandering around Gibraltar might be nice for the Danish princess but I feel for the poor diplomat I send chasing after her only to arrive after she unsuccesfully proposed to the whole Iberian Peninsula...

[Rat-tail]

Yes, hunting a princess can take decades. Even when you get the message that one is "come of age" and rush over to meet her.

[JorisofHolland]

Luckily there is the console