Currently NiFi validates all processors that are in a STOPPED state. To reduce impact when flows contain very large numbers of STOPPED processors, users should be disabling these STOPPED processors. NiFi's "Enable" and "Disable" buttons do not support being used when more then one processor is selected. When needing to enable or disable large numbers of processors, this is less then ideal. The Enable and Disable buttons should work similar to how the Start and Stop buttons work.
Have multiple components selected or a process group selected. Select "Enable" or "Disabled" button. Any eligible component (those that are not running) should be either enabled or disabled.