equivalent of indent-region?

hw <[email protected]> Mon, 16 Sep 2019 00:42:51 +0200
Newsgroups gmane.comp.kde.users.kdevelop
Message-ID <[email protected]>
Hi,

what is the equivalent to the function indent-region that Emacs has?

Neither the TAB key (to indent a line), nor 'Tools->Indent', nor 'Tools->Clean 
Indentation' have a useful function.