Stories in Sprint.ly are special in that you can create sub-items that are grouped and prioritize under the parent story. Sub-items can be independently assigned and there is no limit to how many sub-items you can have under a story.
To add a sub-item to a story:
Click on any Story card title anywhere in the UI: the Dashboard, Timelines, or Organizer (formerly the Items view).
Click on the Add sub-item to story button inside the item card on the item detail (permalink) page.
Enter sub-item details as per usual.
Note: Sub-items automatically inherit the parent's tags. You may edit them when creating the sub-item or afterwards via the normal edit functionality.
Sub-items follow their parent story through the development process. There are a few cases where an operation on a parent will affect the parent's sub-items:
Sub-items will be marked as complete when the parent is marked as complete.
Sub-items will be marked as accepted when the parent is marked as accepted.