Usually indentation and Tab-handling are two independent things as Tabs are used not only for indentation but anywhere ... OK ... I am using same setting ( 8 chars wide Tab, no space insertion on Tab) everywhere, so I don't probably need to worry about "dark corner cases". I am just naively assuming now that Julia scripts were a "new" kind of files I have started to use in Geany so after setting the Tabs to default once it should now stay that way and work as in all other file types ...