go to :
Contents > Resources > C74 > docs > unibrowser > css".
Inside the folder is a CSS stylesheet called "theme.min.css".
this CSS file is EXACTLY the css used on Online Max 7 documentation Pages example :
so you can basically inspect with your browser or your web dev tools and find specifically which part is which !
i noticed the main text (which i mainly needed it to be zoomed) is p tags (paragraph) , i tested :
p {
font-size : 20px ;
}
when it worked in browser i copied it in the end of theme.min.css file and worked in the offline documentation as well !
after all the online documentation is just a web view so you can basically edit it whatever you like (which is soo coool !)