Preconfigured reports settings can be accessed by clicking the “Settings“ menu item on the top-right part of the app. This menu is only shown for users with administrational permissions as the settings affect all users on the Jira instance.
Custom Reports Menu
This setting controls what reports are available when the custom report tab is chosen. If some reports are not useful for you, these can then be disabled.
Common
The setting here controls the date format in which all date are formatted across different reports.