The Image-spec parameter `` thumb '' ( although auto-thumbnailing to user-settings width ) forces a wide left-margin that squeezes the nearby text , so the parameter `` center '' can be added to suppress the left-margin padding . The Image-spec parameter `` thumb '' ( although auto-thumbnailing to user-preference width ) forces a wide left-margin that squeezes the nearby text , so the parameter `` center '' can be added to suppress the left-margin padding .