Image generation
Aspect-ratio selection
Users pick an aspect ratio stored on the queue/render and passed to Gemini imageConfig; expanded ratios are UI-gated by plan.
Implemented Verified from source User-facing
In one sentence
Supported ratios include 1:1, 16:9, 9:16, 21:9, 3:2, 4:3, 2:3, 3:4, 5:4, 4:5; default 16:9.
Known limitations
Server-side validation accepts any supported ratio regardless of plan; multi-aspect is mainly a UI gate via allow_multi_aspect.