Tasks, Notes, Jobs, Events
The Activity section lists all the Tasks, Jobs, Notes and Events that have been added to the Project.
N.B.: Tasks added to a Project appear in the Tasks app, Notes appear in the Notebook app, Events appear in the Calendar app, Jobs appear in the Jobs app.
Tasks and % Complete:
In the web account, a global percentage of completion is calculated automatically based on the ratio of Completed vs open Tasks.
Tasks can be linked to a Milestone. The % completion of a Milestone is calculated based on the completion of tasks linked to milestone.