Built-in styles
Every built-in style preserves your meaning, facts, and point of view, and keeps the length close to what you said. Concise is the one exception, and it is allowed to shorten but still not to drop a detail.
Creating your own
The built-ins are fixed, but you can save any number of your own beside them. In the Writing style section, choose Create style.1
Name it
For example, “Calm and clean”.
2
Write the instructions
Describe precisely how the wording should change. For example: “Remove profanity and replace it with calm, neutral wording.”
Your style never replaces your cleanup prompt. Both are sent to the model together. Cleanup strength is a third, independent dial: it decides how much of your rambling gets tidied away, while the style decides the register of whatever survives.