This window contains a list of all of the named units in the database. From this window you can create or edit units, and control or watch their behavior.
You can send this window away, but you cannot delete it permanently. It can always be retrieved via the 'Windows' menu.
This list can be sorted by name or 'address' by clicking on the applicable column heading.
 
The status of each unit is indicated by the small circle icon at the left of the name.
An empty circle indicates that the unit is OFF. If the circle is filled, the unit is ON. Note that the value of analog devices (dimmable), is shown to the right.
The presence of a blocked-circle icon in the status column indicates that the unit is 'blocked'. You can manually remove the 'blocked' status via the Control Panel, but until you do, you will not be able to change the state of any unit which is 'blocked'.
The check-marks indicate whether you have created ON or OFF scripts for this unit.
If the unit has an X-10 address, it is shown. Note that some devices do not have an address. Groups do not have addresses, 'pseudo' units as well do not need them.
The last element in the status column indicates whether the unit is a group by an 'multi-unit' icon , or
Units which can only be on or off are indicated by the 'up/down arrow' icon, or
Dimmable units are represented by a number which corresponds to the current value of the unit. Lamp modules will range in value from zero to 100. 'Pseudo' units can vary from -32000 to +32000.
The description column is the text description given to the unit in the edit unit dialog. It is for your use, not required by XTension.
Point the cursor at the item “Daylight” and hit the Enter key. You will see the Edit Unit dialog window :