How to set the parent schedule based on the children?

Sometimes you have type of work items, that you do not want to schedule explicitly, but you want the schedule to be derived from the children. 

Starting version 1.5. you can do it with "project" type of the task.

Lest suppose you want to make the schedule of work item type "portfolioepic" be derived from children (capabilities, features, etc.). 

You will need to configure the gantt:

• 1) so it shows the parent child relation ships using the right link role the "Portfolio Epic" type so the "Gantt type" is set to "Portfolio"
• 2) optionally you want to configure how many level of items to load
• 3) and you set the Gantt presentation type