I'm frustrated by another "hitch" in my Aperture program. When I go to the adjustments tab in the Inspector there have always been five choices that automatically appear for my use; color, exposure, enhance, highlights and shadows, and levels. At some point not long ago the exposure choice disappeared. I can retrieve it manually by going to the "add adjustment" tab which has a drop down window that includes many tools, among them the choice for exposure, but as soon as I go the next picture the exposure option disappears again. Does anyone know how to fix the choices available in the drop down list? how, so to speak, to make the list include the my choice of tools appear permanently and automatically each time a new picture is selected? I've tried default settings and have searched for a clue in preferences but no matter what I do the exposure option in the add adjustment drop down menu always disappears.
Incidentally, I've just updated to Lion and the latest version of Aperture and this problem, which existed before has carried to the new OS and the new Aperture.
I would truly appreciate any insight on this matter. Thank you.