All the events generated by a host, are collected, aggregated, and grouped under different categories before displaying them in graphs and reports.
From any tab, click on the host name to see a General Summary for that host. The General Summary shows you the number of events of each type that have been generated by that host in the selected time period. You can then click on the event count against each event type to see the exact event that was generated.
Important Events tab:
EventLog Analyzer considers events such as user logon/logoff, user account changes, and server-specific events as important events, and shows them under the Important Events tab. This simplifies troubleshooting to a great extent, because you don't have to sift through rows of log information to identify a critical event. Any event that may require more than a customary glance is shown under this tab.
All Events tab:
All the events generated by the host, are classified by process (event type) and shown under this tab. Click on the event count displayed against process, to see the corresponding details of the event generated. The event summary shows the event log source (kernel, syslog, etc.) and the facility (daemon, syslog, etc.) along with the message (event description) and the event timestamp.