How to create a Content event

Create a member-organized event from Events → Community Content.

Create from the web

Open Events in the guild nav and switch to Community Content, or jump there from search (⌘K / Ctrl+K).
Click New Content.
Fill title, time, and objective.
Under Signups, choose how members get into seats (caller assign, comp self assign, open parties, or live comp). If you named a Caller and the composition has a caller seat, they are signed up and placed in the first empty caller seat (caller assign and comp self assign only).
When Signups needs a saved build, pick a community composition in the Composition section.
Set visibility, then create the event.
Copy the share link and send it to your group.

Who can create

Guild members can create Content events when your guild tier allows. Officers can also create Content events. Guild CTAs stay on Call To Arms on the same Events page.

Discord

To announce in Discord, use /content-ping — see Discord commands for Content.