I wanted to play CK2 on my laptop, everything was fine, but I tried to increase the resolution of the text. Disaster! The loading screen is huge, and I can’t access the menu anymore. Help me, please!

So i have many children :) 1 Kingdom title 2 normal duchy (1 outside of de jure) 1 duchy with seperate law tab - and in succesion this one go independent (it is de jure of the kingdom) in both i have Absolutive Cognatic Elective Gavekind succesion law. I am perfectly fine with them getting title but not with going out to be independent. I cannot change law in that 1 duchy... is the only option to attack and get it back?...

My City vassals don't have a Line of Sucession ,but Baronies of others states do have a line of sucession

If all goes well, I'll eventually get more holding slots. Should I just fill them with castles or should I build cities and temples as well?

How do I access the silk road as venice? I already have territories in the arabian coast such as Jeddah, but I cant build trade posts on it because it "Cannot be reached by sea"