New Player Question

Is there a way/setting to control all the civilizations placed in a scenario or campaign using the Editor?

For example to control both the Romans and Carthaginians in a Punic War campaign?

i believe you can only do it with a cheat code, but i forgot which one

You mentioned civs that I think are in AoE1, rather than AoE2. However, in AoE2, pressing Ctrl+Shift+Fx will select player x.