SC POWL of Requester - possible to display SC on header level?

Dear Experts,

in SRM 7.0 CS, i am facing the following question w.r.t. the SC POWL of the requestor.

Currently, in the POWL of the SC requester, the display happens on item level. That means, that all the positions of all the shopping carts of the requester are displayed in the list.

Is it anyhow possible to have this display on the level of the "Header" of the shopping cart? I am thinking of a triangle drop down in the field "Shopping cart number", in case there is more than one SC position in the shopping cart.

Thank you very much for your ideas.