How should I denote static classes in UML?

Question

So I did some research about how to denote static methods and classes in UML. I found on these two pages that static methods should be denoted by underlining them, but what

Answer 1

Marking a class as static is a very low level information, which we don't put in UML diagrams usually. UML 1.0 as well as 2.0 gives some flexibility to designer/developer to modify the convention if it suits to your audience/team.

You can put a note to that class, or use something like <>( as used for interface).