Display suite's adding custom fields loads eternally In "Manage display" page of my product content type, I have the custom fields tab. In that tab I have some buttons... None of these buttons works. I tried both but the popup div loads eternally there.

Anyone with the same problem with any clue?

Thanks
all these are the view modes like teaser,full content etc.whenever you create any panel ,there will be tabs of full-content etc...then u can edit the settings displayed below these tabs..here these buttons would be visible...