How do I add an item under "Share"?

1. Click on the menu item "Share" in the left menu bar.
2. Select the corresponding group of objects in which you want to make something available for sharing.
3. Then activate the selection on the right, "Share object".
4. A new field appears which resembles a comment function. To the right of it there is a settings symbol. If you click on it, you can then list what is available for sharing and enter information about the item.