How to Increase number of servers in "Health Report" ?

How to Increase number of servers in "Health Report" ?

 Hello,
 I'm using Opmanager to monitor all devices/servers. And I have to export health report weekly.
 But the health report shows only 10 devices/servers as pic.
 
 How can I increase more than 10?

 Thank you.
                New to ADManager Plus?

                  New to ADSelfService Plus?