I used Firefly today to generate one image and firefly just exploited my credit, lefting me without image I asked for. I asked it to correct the hight of the shelves an he didn't do it.

Hey ​@milica30881909snz9 

Could you elaborate a bit more on what you mean by correct the height of the shelves? Were you using a reference image? Was it a generated image?

This is a very specific request. Not exactly certain AI image generated models would or could do the requested request.

A project like your own, would be better to do in PS. PS has increments/ rulers and provides consistency. 

Whereas raising a flag, could be an actual task AI image generator could do. 
Prompt: 
have the flag facing right at the top of the pole.  (or something to this effect)

Cheers

Nate