Dave alluded to this, but I’ll say it outright: You probably shouldn’t alphabetize your layers. Changing the layer stacking order is not something that you do arbitrarily. The layer stacking order determines the render order. You change the layer stacking order to make functional changes to how your composition looks.
That said, see “Change the stacking order for selected layers”.
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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