Illustrator

Select the next object in the stacking order

You can select an object above or below a selected object in the stacking order. These commands do not work when in isolation mode.

Do one of the following:

To select the nearest object above or below the selected object, choose Select > Next Object Above or Select > Next Object Below.
To select the topmost or bottommost object that overlaps the selected object’s area and that is in a different layer, right-click (Windows) or Control-click (Mac OS) and choose First Object Above or Last Object Below from the context menu.