MoreIntervals button missing

Hello all,

I need to change the deprecation key to "0000". When i double click on the 01 Dep Key to change it. In the bottom of the screen the "MORE INTERVALS" button is missing.

I have checked the Asset screen layout in deprection area and unable to trace it.

Can somebody let me know what changes to be done, so that "MORE INTERVALS" icon can see .

OR

Can i change the Dep key from the main screen? Please advice.

Regards,

Kumar