If you look along the top there are two drop down menus. The first is for the number of logs you want to view. The second is the type of log files you want to view. It reads the same log file that is written to, but when using this viewer, you can filter it out so you are only seeing certain lines of the log. Whichever ones are pertinent to the log type you have selected. At the bottom there are three buttons, the first, Add to Zone button only works in the firewall log viewer. You can add the non local IP address to either the trusted zone, internet zone, or the blocked zone. The More info button button will tell you about the entry. There are limits to what it will tell you. And the Clear List button button will do just that.