To edit a size of the banner that will be blocked:
Select Options
Select Plug-Ins
Highlight Advertisement blocking
Click Settings
Select Image Blocking tab
Highlight the image size you want to modify
Type in the new the size of the image to be blocked in Height and Width fields
Press Modify button
Press OK.
You can quickly access the plug-in properties by right clicking on its name in the Left Panel of Outpost Firewall's main window.