Problem with photoshop selection tool

Question

My Photoshop setup seems to have changed, and I can't figure out why. It used to be that if I dragged with the mouse with the selection tool, a new selection would be created, unless I held down the shift-key, in which case it would add to the existing selection. But now it is always additive, even if I do not hold the shift-key. Anyone any ideas why this should be?

(CS3, Macbook Pro)

Answer 1

there are some options just below “edit” first select marquee tool and than click the above section you will see some options like “new selection” add to selection select new selection and your problem will be solved.