Slider that pushes compositions from minimal/simple (negative values) to intricate/detailed (positive values). Can go a bit mental on higher positives.
Z-Image doesn't really need a detail slider, you can achieve all of this through prompting alone. This is just for when you want that extra nudge to dial complexity up or down without rewriting your entire prompt. Think of it as a convenience tool for quick adjustments.
Still very experimental, so results may vary depending on your base prompt and model settings. Sometimes it's easier to turn a dial than to type the perfect prompt at 2 AM.