This article gives instructions on how to assign permissions for pages and subpages with Live Edit.
Who can use this feature?
System Administrator | Owner
Instructions
Sign in to your site and navigate to the page you wish to set permissions for
Ensure that Live Edit is On
Select Properties in the vertical tabs
Select Permissions.
Select the groups that should have access to this page.
View: Viewing rights only
Author: Ability to create and edit items, but cannot publish
Publisher: Create, edit, and publish items
Owner: Full rights to the page.
Click Save Page Changes.