You can hide dashparts from view so that they are not visible on the dashboard. You may want to do this in cases where there are too many dashparts displayed on the dashboard.
To hide a dashpart:
Select the dashpart that you want to hide. How?
On the dashpart title bar, click the dashpart name.
On the drop-down menu, click Hide Dashpart.
Learn about the Dashboard toolbar
Display hidden dashparts on your dashboard
Configure access control to dashparts