In the sidebar's "Community" section, click "News" to open the community news board.

The news board is shown. It is still empty — no news has been published yet. As a manager you can create one with the "New post" button.

Click "New post" in the top right to open the compose dialog.

The dialog opens on the "Post" kind. The "Poll" tab would create a poll instead — here we publish a plain news post.

Type your news content in the editor. The toolbar lets you format the text (headings, bold, lists, links).

Click "Publish" to broadcast the news to every member of the community.

The news appears at the top of the board, signed by its author. Every member of the community sees it and receives a notification.