A single page or an entire web domain (source) can be blocked or allowed. For example, to allow Layers at www.popupcop.com, enter this page name into the Allow List. To allow Layers at all the web servers (e.g. www.popcop.com, secure.popupcop.com, etc.) in the popupcop.com web domain, enter *.popupcop.com into the Allow List.

The arrow-buttons, & , allow you to move one or more entries between the Allow list and the Block list. Select the item or items to be moved and then click the desired arrow.

The Blocking type radio buttons allow you to specify a general rule that PopUpCop will use to determine whether to block a particular Layer. You can always override this rule by adding sites to the block or allow lists.

• If you choose the option Block all, PopUpCop will block all named foreground or absolutely positioned layers.
• If you choose the option Block only layers with third-party content, PopUpCop will block a named foreground or absolutely positioned layer only if the layer contains content from a different Internet domain from the main Web page. For example, if a page, say, http://www.ksndgdmdsd.com/ contains named foreground or absolutely positioned layers both from ksndgdmdsd.com and from an ad bureau named obnoxiousads.com, PopUpCop will block the advertisement from obnoxiousads.com, while not blocking the layer from ksndgdmdsd.com.
• If you choose the option Block layers only at sites on the block list, PopUpCop will block all named foreground or absolutely positioned layers only if the current Web page is found on the Layer block list.

PopUpCop helps you form the proper URL to enter in the Enter new page, server or domain dialog. When you click on New (or select an entry in either list and click Edit) then you see this dialog:

This allows you to type in the URL (web address) of sites that you want to add to either list. The two buttons on the right, Make server and Make domain are URL helper tools. They allow you to take a complicated URL and quickly turn it into either a server address or a domain address.

For example, if you copy a URL from your browser, such as, http://www.popupcop.com/test_ads/test_ad.jpg and then you paste this into the type-in field, clicking the buttons will simplify the URL and make it into a server or domain. Clicking Make server gives www.popupcop.com and clicking Make domain gives *.popupcop.com. The asterisk (*) tells PopUpCop to match any characters in the name. Thus, you can filter on similar domain names, such as abcdserver.com and xyzserver.com, by entering *server.com.

The Delete button removes the selected items from the list. To remove more than one at a time Ctrl-left-click on the items and then click the Delete button. A confirmation dialog appears for you to accept or cancel the delete action.

PopUpCop's Image information dialog shows what images PopUpCop found on the page that you are currently viewing. It also indicates whether the layer contains third-party content. From this dialog you can determine which what layers PopUpCop has blocked. You can also use this dialog to create entries in the Layers allow or block list.