- How do I attach an existing Bug to a User Story so that it appears under its Bugs tab? When testing a story, it is easy to add a new bug that will appear under the Bugs tab for the story. But there is no lookup function for existing bugs there.
- It is possible to assign bugs to stories both from bugs and stories' end. In the first case open a Bug, on the right side find Info panel. Click on User Story field: in the lookup you can select an existing story. In the second case open a User Story, find Bugs tab there and click on the Magnifier icon to find for the needed Bug. Done: now Bug is linked to a User Story and appears in its Bugs tab.
It is also possible to use Board view to attach bugs to stories. Set up a view showing Bugs as cards and User Stories as lanes (rows or columns). Focus on two lanes: "No User Story" lane and the lane of your target story. Then assign a bug card to a story lane within drag'n'drop.
The same way you can attach existing Bug to a Feature so that it appears under its Bugs tab.
These are existing limitations in Targetprocess tool. Hopefully we'll improve this behavior sooner or later.