Log File Viewer monitors all opened logs by default. If a new line is added to a monitored log file, the log name appears in bold in the log list. If the log file is selected or displayed, the new lines appear in bold at the bottom of the log file. Figure 17.6, “Log File Viewer — new log alert” illustrates a new alert in the yum.log log file and in the messages log file. Clicking on the messages log file displays the logs in the file with the new lines in bold.