Highlighting occurrences of an identifier in Fortran

[Sceptus]

Hi,

I'm completely new to Code::Blocks. I just installed it with the Fortran features. I noticed I am capable of highlighting occurrences of the same keyword, (e.g. all instances of PRINT*), but it does not know how to highlight occurrences of identifiers (e.g. all instances of a variable N). What sort of settings or plugins do I need in order to have this feature?