From time-to-time we have the requirement that we need to change all of the permissions on all of our DNN pages.  This can be a real pain, going through each page, and changing the permissions one by one. 

However, there is a shortcut to this that you may or may not know about.   This shortcut allows you to copy the permissions from a parent page to all of the child pages under the parent.   This can save you a ton of time and it is easy to do.

1. Navigate to the page whose child you want to change all of the permissions on.
2. Go to the page settings for the page.
3. Under permssions click on the button "Copy Permissions"