There are several ways to view an issue:
To view some of an issue's details while still being able to see your board:
You can close the Issue Detail View by clicking the 'x' icon (or typing 't').
The Issue Detail View may look different to the screenshot below if it has been customised.
Screenshot 1: the Issue Detail View
|Shows you ...
The issue's details:
|The issue's Description field.
|Any comments on this issue.
|Any files attached to this issue.
|A convenient summary of the issue's sub-tasks (plus a button for quickly creating new sub-tasks).
|Any test sessions for this issue (if you are using Bonfire).
Any commits for this issue (if you are using the DVCS Connector).
To view all of an issue's fields (that is, the JIRA issue screen),
Screenshot 3: the JIRA 'View Issue' screen
The Agile panel (bottom right of screen) contains sprint information. If the Issue is in an active or completed sprint then the sprint name is shown, along with the end date of the completed sprint. Clicking the sprint name will allow you to view the relevant sprint details; for active sprints this will take you to the Work mode (with focus on the relevant issue), or for a completed sprint, you will be taken to the Sprint Retrospective Report.
When viewing an issue within JIRA, you can also jump to the relevant GreenHopper board(s) by selecting More Actions > Rapid Board or clicking the View on Board included in the Agile panel.
To view multiple issues as a list in the JIRA Issue Navigator,
Screenshot: right-clicking an issue in 'Plan' mode