How to fold the content when submitting a proposal?

The Academy - Players helping Players
1

How can I fold the content like the picture above? Which function is used in the following picture?Can someone tell me which option to use?
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2

Use this cog/gear, and select “hide details”

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2 Likes
3

Okay, thank you.

4

No problem, I’m happy to help. I only just learned how to do this recently as well :)