image 5, I'm completely lost. It seems buggy but tht's because how to edit is not obvious

Trying to edit an image in image 5 is just plain confusing. I have no idea what I'm doing and if I'm lucky I may stumble on to something useful. Documentation would help, or would it. I looked at image 4 docs, and it was mostly on how to create a prompt. That's not what we need. We need to understand how to use Image 5 features, not how to write a prompt. Ridiculous!