How to disable metadata fetching

I am new to Infuse, does anyone know how to disable metadata fetching?

I have all the metadata fetched by Emby on my nas, I don’t want Infuse to fetch them again because the app size of Infuse will get bigger and bigger.
I assume that actors pics fetched by Emby is not recognizable for Infuse, so Infuse will fetch them again.
I have already turned of Auto Fetching on Infuse, but it still keeps fetching actors pics.