The message list shows the Subject, Sender and Date of each message in the selected mbox file. Use the cursor keys to move up and down through the list of messages. Use the SELECT key to chose a message to read.
Use the Cancel key to return to the file list.
Mailing lists often include the name of the list in the subject line. To make it easier to read the subject you can filter the list name from the subject. Use the preferences dialog to enable subject filtering.