There are two possibilities:

  • either you create smart links in a text editor
  • you add a specific cross project control which allows you to maintain a list of cross project links

You can do this though the menu in the text editor

You can also just type #Project Id/Item Id# in a text editor

Option 2: Cross project link control

In the admin client you can add a cross project link control (see Input Fields). This will show up like this:

See an example below: