Dall-E prompts for negative space

Hi,
How can I write prompts that will cause Dall-e to generate images containing negative space? For example, I want my subject in the corner of a room with the walls of the room bare so I can put copy there.
I’ve tried all kinds of prompts, such as “full body” “wide angle” “rule of thirds” “negative space” “corner of room” “lots of clear sky” etc. but the program consistently puts my subject smack in middle of the frame, and even cuts off the edges so I have a hard time extending the image.
How can I get around this?