Each message gets a spam report. You can see this report by going to the Mail Jail and double-click on a message. You will see a spam report at the bottom.
Each Analyzer adds its information to the report. The bottom will have a total score for the message.
Show Decoded will show the message after decoding characters and Base64 encoded text. It will not decode attachments.
If you want to see the reports for messages that aren't flagged as spam, you'll need to turn on Score and store non-spam messages in Miscellaneous.