Welcome to tag of the day, my not-daily (last one was 10 months ago!) series where I share tags I found useful but underutilized in generations and explain how/why you should use it.
If you've cared about learning even the most basic prompting you're likely familiar with tags like portrait, upper body, cowboy shot, and fully body, or even eyes/head out of frame and lower body. There's actually two more tags that work as framing tags: knees out of frame, and feet out of frame. Once you know they exist, they're pretty easy to use an Illustrious responds well to them.