design patch antenna in momentum

hy.
in ads momentum ,I want to enter the exact dimensions of the antenna patch ,with the mouse I can not , i want use Insert > Coordinate Entry but i I do not know how ??
I click on the desired shape (rectangle) ,and after I enter in coordinate entry , it gives nothing,it gives always with mouse ...
It is a method that I can directly give the dimensions (length and width) of the patch antenna in momentum???

thak u

et alors no reponses , merci

thank u ...problem is reoslved