thanks for replay
My JDeveloper version 11g R2
it's not a popup it is a jsf page with in bounded task flow run as Dialog
as i made jsff fragment contains ADF read only table , and i made button to create new Record or Update Record . i put the spacer but no thing changed .
i applied only this example in the following Bolg
and my problem solved as i don't see the widow height and width .