To quickly add a link to a task in the description or comment type "#" and then begin typing the name of the task. A dropdown will populate with the task name that match your text and you can select the tasks to link to.
You can link to tasks in two ways:
The link that we insert to the text is an absolute link to the task. This means that if you move the from one project to another then the link will still work and you can open the task.