You can group your tasks using different fields values. When grouped, the task structure (WBS) is replaced by the group structure. This means that the task hierarchy is not shown when items are grouped.
To group using a specific field, make sure it is added as a column using first. The group feature is in the Data drop-down. The groups are marked with selected colors, both, on the task list and on the timeline indicating the earliest start and the latest date of the tasks in that group.
You can define the order of the groups, activate fields to create groups, and color code the created groups. If you want to start from scratch, click the "Deactivate All" button.
The groups will be marked with selected colors, both, on the task list and on the timeline.
Multi-level grouping is possible and tasks will be counted in each group. The group structure will be based on the of active grouping elements and the order of grouping elements (fields) determines the group hierarchy.
A task can not be duplicated which means that a task can belong to a single group only.
For example, let's group the tasks by Status and Assignee fields:
Sorting Grouped Tasks
Presently, once tasks have been grouped, you can filter them by Date.
The first row is reserved for aggregations and unless you set it for each column separately it will remain empty. To learn more about configuring Column View and aggregation go to Column Views Gantt.
For example, let's group our tasks first by Issue type field and within this group by Status. The tasks are grouped in you can now collapse the groups which you do not want to analyze. Based on the information displayed we can see that there is only one Feature BPV-6 has the status "In Progress". Let's have a closer look at the Original Estimate column which has two values 6w which is the sum of all the lower-level items, in that case, the stories but actually, the feature was also estimated and its Original estimate is 3w 1d which is the sum of all items in that group. The initial estimate, in that case, was much less the bottom-up estimate of the stories