When I am looking on an active sprint, clicking on a task will open the tasks information in the right side of the computer. how do I configure the fields (screens) shown in that area.

[Gil Klar]

When I am looking on an active sprint, clicking on a task will open the tasks information in the right side of the computer. how do I configure the fields (screens) shown in that area. 

[Deleted user]

That screen is configured within the board...

Go into your board configuration and look at the last item on the left hand list - "Issue Detail View". You can add and/or remove fields here. Note that you can only position fields within their groups, you don't have full control of this screen. Also you can only add fields that have been attached to your project.

More info here:

https://confluence.atlassian.com/agile/jira-agile-user-s-guide/configuring-a-board/configuring-the-issue-detail-view