Confusing: Gemini nano banana vs Gernerate Image

:bullseye: What is your goal?

Upload image from Google drive to nano banana to generate a poster based on that image

:thinking: What is the problem & what have you tried?

I don’t know how to set an uploaded file in Gemini module .
However, I see there is a module “Generate Image” in Gemini module

Which one should I use?