The purpose of the dashboard is to provide quick access to information—lists of projects, tasks, reports. Once they are created, they can be edited to update or remove reports on them.
Any changes made to a dashboard will impact all users who have access to that dashboard.
From a Dashboard, the Dashboard Actions menu contains the option to edit. Selecting Edit will return a user to the Dashboard light box. Here users can add, remove, or rearrange reports on a dashboard.