The question I have now is: How can I change the font and size of the Chapters titles and numbers? There should be some lines to change in the script but I don't know where ....
The font, font size and shape of the chapter numbers can be changed via:
The font selection is done here with
The chapter title can be change via:
Here, we used Helvetica as the font.
Put that into your preamble, and change to your likings.