Designer -> java services editor

Hi All,
This is regarding the highlighting occurrences of word (variable) in the designer’s java service editor

i’m using 9.6 designer, and i see the Alt+Shift+O is disabled (its always disabled on the tool bar)

can someone confirm if there is a way to enable this; its helps a lots in analyzing the java code, debug the java code etc.

Any help is appreciated.

Thanks & regards
Ajay Kumar Kasam