Glossary
Seed
The number that determines a model's random starting noise — same seed and same prompt always gives the same image.
Every image generation starts from random noise. The seed is the integer that initialises that noise. Reusing the same seed with the same prompt, model and settings will reproduce the exact same image, which is essential for iterating: lock the seed, tweak one word, see exactly what changed.
On Synexa, the seed is shown under every render and one click re-applies it to a new prompt.