Lay out

Hi

Can any body tell me I have created layout for company code at customer level have given lay out name, desciption after this field section screen has come in this screen how to enter the fields, this screen is appeared in diaplay mode, this is urgent i have to add one field to this screen.(in this screen only three options are there 1.fieldafter 2.slect T/code o7z4d)

Thanks in advance

Prabhakar