The Log Viewer is used to display a variety of information, whenever information is best displayed as simple text. It is manually invoked by various View menu items and is used to display hexadecimal representations of binary data in fields. The content of anything displayed in the Log Viewer can be saved via the File>Save or File>Save As... menu entries.
You can change the font size via Font>Bigger and Font>Smaller. You can select an alternate background colour from the context menu.