When you create a new work item, or when you double-click on an item in the results list, a work item form opens. You can modify and save changes, add links and attachments, view history and other details depending on how your TFS administrator has customized the form. The image below is an example of one customization.
See Related:
Searching the work item repository
Adding and saving a work item query
Viewing work item query results
Managing work items from the Team Explorer view
Managing work items from the Pending Changes view