Quality only matters for gpt-image-2.5 (the default Gemini image model ignores it, and pricing is flat per image either way). Style opens the style library: everything in there was published by someone else (or by you). Pick one and the chip folds away, replaced by a cover thumbnail on the row below (with Style written across it) — hover it and it reads Replace, click to pick another, and the × at its top right takes it off; when you generate, that style's description is appended to your line while settings like the model and the ratio are swapped over too. If the one you picked has a cover, a style node is also dropped to the left of this node and wired in — so you can see at a glance that this image came from that style, and you can drag it onto other nodes; cut that wire or delete that node and the style comes off with it. Camera is a gear set (body / lens / focal length / aperture); leave it on and that gear phrase is appended to the prompt. Marker opens element selection, where you circle the spot you mean on an image that has already rendered (the same thing as on the video input bar, see 4.2). Camera and presets are mutually exclusive: with the camera on, Preset is grayed out; with a preset applied, the Style and Marker entries are not shown at all.