How to make toolbar buttons and text in help box bigger?

It is possible to enlarge/reduce the characters in the data entry section.

 

Since 2020 I report those questions;

-How to enlarge the toolbar buttons and the text under the buttons (the buttons)?

-How to enlarge text in the selection box?

How tho enlarge text in the help box?

 

I can provide Screenshot, but I don't see hwo to do it in this interface.