To help you manage security, you can quickly view a list of all users with access to your page using My Pages Inspector.
To view a list of users with access to your page
In the top navigator, click Site Administration.
In Site Administration, click the Content tab.
Under Page Management, click My Pages Inspector.
All pages you own are displayed.
Next to the page whose security you want to verify, click the [User List] link.
A list of all users who have permissions to view your page are displayed. To modify permissions, you can go back to My Pages Inspector and use the security lock icon.