so if bishops like my antipope more than real pope they give taxes to me?
how can I make my bishops like my antipope and how to see the relationship number between bishops and antipope, cos I only see number with me and with real pope
Well if you go to the screen where you can look at income, you can mouseover one of them (church tax?) to see who all is paying the anti-pope taxes. The big benefit is not having *your* realm's bishops pay taxes to you through the anti-pope, it's having all foreign ones who like your anti-pope more than the Pope (or their liege) pay you the taxes. And well, all of your realm's bishops that like either you or your anti-pope more than the Pope will pay them to you as well of course. At least that's how I understand it.
I'd say if you wanted to really max out the income, you either get your anti-pope to go on crusade with you (crusader trait = +25 church relations), or you put a heretic as anti-pope and spread that heresy - all of them will like your anti-pope more. Or try to make the Pope heretic (you *can* do local inquisitions outside your own realm, I think)? The heretic options have... consequences, though.
A couple of quick questions:
I am the King of Sicily and Africa, and can create a lot of duchies. Are there any good reasons for doing so? I like having counts all over the place. They are easy to handle when they revolt, and as far as I know, I also benefit from it economically, as there is no middle link in the form of a duke, so they'll pay tax directly to me. Am I right?
I have switched to elective succession, and get a penalty for holding too many duchies and too many votes. It seems only 3 persons are able to vote, which means I have exactly 1/3 of the votes. How many duchies do I need to create to get rid of the penalty, and how easy is it to get my guy elected if there are more voters?
Not creating duchies unless you have to can be useful. Eg. I think the counts are less likely to desire them if they don't exist, you have no electors other than yourself (if using elective and there are no existing duchies), and such. On the other hand, they will blob up via inheritances and some will create them at some point anyway, probably. Creating duchies is a nice way to get some quick prestige for a new ruler, on the other hand.
"Too many held duchies" happens if your king holds more than 2 duchies, regardless of which kingdom they're in. "Too many elector titles held" happens if you have more than *1* duchy title in that kingdom. I don't think I had too many held elector titles even if I had 1 duchy (or none, as the king gets a vote anyway) and there was only 1 other. In the case of a tie, eg. 1 vote for your choice and 1 vote from the only other elector duke voting for himself, I think the king's nominee wins.
And since some of that was old advice, here's a short response to some of the advice others have given: if you DO make both Sicily and Africa elective, I would assume the voting is separate for both, so keep an eye on that, the kingdoms can still split up. Africa is only 3 duchies though, so consider only creating one of them, as per the previous paragraph. (btw, I do recommend Palermo, it's got the most holding slots in the area. Tunis/Tripolitania/Cyreneica are the richest in their duchies, so they're ok too, but the only ones that can really rival/beat Palermo in the area are Alexandria, Rome, and Byzantion, really ... currently playing Sicily&Africa myself too, soon Egypt will be added to that as well).