Start by Multi-Selecting an entire group of tickets and selecting 'Edit All' from the pop-up edit menu.
Click the top-left dropdown menu to select the type of ticket to edit (Milestone, Constraint, or Task).
Use the dropdown menus to edit the Location or ticket duration in days.
Click the triple dot dropdown in the top right to 'Add a Pin,' Duplicate, or Delete the group of tasks.
Click Save when done.