Composition issue in text to image

Really good AI, but one thing bothers me..

Let's say I writght:
A snail in a forest with mountains in the background

I will get exactly that, but if I want the snail to cover less space in the image, and focus more on the landscape, so i wright:
A snail in a forest covering 20% of the image, with mountains in the background

The composition doesn't change.. I might be wrong for giving bad instructions here, but I also thing this would improove your generator a lot!

I hope this helps!