So I have a configuration menu and I want to add the "submit changes" button fixed to the bottom right corner of the screen. My issue is, my configuration menu options can expand past the bottom of the screen. I am afraid that some options will be hidden behind the fixed bottom rectangle as you can see in the image.
Is there a clear way to indicate to the user that there are more options below? Should I make the submit button on the bottom of the screen, but not fixed so the user must scroll to find it? Ideally, I'd like the user to know that there are more options while always having the "submit changes" button visible