configuring undo in AEM

[reusr1]

the documentation page at http://docs.adobe.com/docs/en/cq/5-6-1/administering/config_undo.html suggests modifying the undo list in /libs - it seems that's not a good practice since changes in libs get overwritten by an upgrade of AEM. Is there a better way to extend the undo list with an overlay in apps instead? 

[Sham_HC · Accepted solution]

Just modify from felix console & it will take care of rest. Please file a daycare request to fix the documentation.

[smacdonald2008]

Like other CQ components, you can overlay it.  However test it after you overlay it.

[reusr1]

overlay would still mean I have to copy the structure from libs over and that is inherently not upgrade save - it seems there should be a better solution to this problem