To add a role to a page so that a user can either view or edit, navigate to the page you wish to add the role to.
Hover Over the 'Pages' tab in the CM Admin bar and select 'Page Settings'.
Inside Page Settings select the 'Permissions' tab.
Inside the permissions tab click on the 'Select Role:' drop down, select the Roleyou wish to add to the permissions list and click the 'Add' button.
Once you add your Role to the Permissions list your can have users who have this role either view only or view and edit this page.
Select the 'Update Page' button to have the new role applied to the page