Notepad++ - how to auto select "xml" syntax for files with "config" extension?

Question

Notepad++

Notepad++ is good for everyone, and it even has syntax highlighting, for example, for xml files. But he himself turns on this highlighting only for files with the extension ".xml" And how would he configure it so that when opening files with a given extension (for example, ".config") he himself included the necessary syntax?

Answer 1

Settings —> Style Configurator

Answer 2

And for some reason my settings are not saved, I should close the file. Open another and everything is the same.