You can view the details of the project by clicking on the respective project in the Project Listing page and then clicking on the Details tab.
Milestone
Hovering the cursor on any of the milestones, show a few inline options.
Task
Clicking on any of the milestones, shows the tasks assigned under it.
Adding a Task
Editing a Task
Sub task
Existing sub tasks under a task can be seen by hovering the cursor on the task and clicking on the sub task option.
Adding a Sub Task
Editing a Sub Task