Here is where you can change the way that the Active Log Window appears :
 
Log state controls only which events are displayed in the active Log Window. All events are recorded to the Log File regardless.
You can specify how long a period you want to keep in a single log file. You'll want to make this 'daily'.
Logs are kept automatically by XTension in a 'Logs' folder in the XTension folder.
You can choose what level of detail you wish to see on the the active 'Log Window', however, XTension always logs all activity to the disk copy of the Log.
By choosing 'Exceptions only', you will see only bad errors and messages which are written explicitly by your scripts.
By choosing 'Database items only', you will see all changes to any unit which is in your database. Any commands which are received which are for addresses which are not in the database, will not be displayed.
The option of 'All' is useful when you are setting up your system, or when you are suspicious that a neighbor has discovered the X-10 system !