On Activities Tab on Cerebro control panel you can create and edit a list of activities that used in work on your projects.
In Cerebro every activity type is defined by its unique name and can be color-coded.
Activity can be used as task or user attribute in the current universe.
If used in task properties, this attribute is made in the same way as enumeration type tag (see “Task tags”), this means that every task can be accompanied by one type of activity from the list (see “Task properties”).
Otherwise, every user can be assigned onto several activities that he can work on in any given project. This can be done either at the Users tab, defining activity list for every user, or at the Activities tab, defining a list of users for every activity.