I want to give a focus a prerequisite, but what do I write in the "Prerequisites" box? I tried writing the name of the focus I want as a prerequisite, but it did not work and I cant see a builder to add a focus already created.

When clicking into the box it should open up a focus selector which looks like:

When you press the + button it will create an "AND" group. Any focuses you add to this box will be treated as requiring all focuses.

E.g. with the following you either need "Democratic Deadlock" OR "Study Industrial Methods" AND "Railway Expansion"

If this box isn't popping up for you, would you mind sharing what device & browser you're using, so I can investigate further?

Prerequisites box is for choosing which focus came before.

The requirement's box is for choosing what specific conditions need to be filled before you can begin the focus. For example, you could put

ENG = {

    has_capitulated = no

}

and this way, the focus could only be chosen if Great Britain hasn't capitulated.

Hope this helps 

Thanks for help!