thank you Mya,
It works, thank you again, I want to highlight the speed of all the responses I received ... great follow up!!
And I want to ask you another question ... I think it will be the last
I use the "One Page Portfilio" with several Portfolios where the thumbnails that are themselves linked to pages, located in one portfolio page ....
These pages are in submenu of their portfolio ... for now it suits me (because it is convenient for building the site ...)
then I would disable these menu pages, they will only be selected by portfolios (it would therefore be seen that portfolios , the home page and contact) I am understandable?
I would also like selected pages are highlighted in the "portfolio parent" in the menu (since they will no longer be visible ...) is it possible ?