Editor Mode not found to change the property of J2EE Configuration in NWA

Hi,

I have worked on an issue where an end user asked me to configure changes in NWA.But I did not find the editor mode.I tried all the buttons in the page of NetWeaver Administrator -> Configuration.But I could not change the customized value.Tried all possible means.Later logged into Config Tool and made the changes in Configuration Adapter successfully.Restarted the cluster later.

Why couldn't I change the value of property in NWA? Where do I see the configuration editor mode in NWA?Please help.