Midjourney, Firefly and ChatGPT images, hands on

Member lesson

Midjourney's parameters that matter

Lesson 3 of 8 in Midjourney, Firefly and ChatGPT images, hands on.

Checked against the makers' documentation on 9 October 2026.

How to Use Stylize Parameters · Midjourney
Lesson

A parameter is an instruction typed after the description. Midjourney's help gives three rules for them. They go at the very end of the prompt, there is a space before the two hyphens, and there is no punctuation inside them. So "poppies--ar 2:3" fails, and so does a comma after the last value. Most of them also sit in the settings panel as defaults. Typed into a prompt, a parameter changes that one prompt only, which is why it is worth typing them.

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Members answer these 3 questions and keep the ticket for this lesson. Every lesson has one.

  1. Question 1, locked

    Which of these aspect ratios will Midjourney accept?

    • --ar 1.39:1
    • --ar 139:100
    • --ar 8.5:11
    • --ar 1.39
  2. Question 2, locked

    You add --no bottle to a prompt. What does Midjourney's help say this does?

    • Weights that part of the prompt to minus 0.5, pushing away from a bottle without forbidding one
    • Guarantees that no bottle appears in any of the four images
    • Removes bottles from any reference image you attached
    • Raises Chaos so the four images avoid the same objects
  3. Question 3, locked

    You want to see what Stylize changes. What should you hold still while you move it?

    • The Chaos value only
    • The aspect ratio only
    • Nothing, since random draws show more
    • The seed, along with the prompt and the other settings

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