The following window (MAC shown) will appear on the users desktop:

The program only highlights files with an ".ies" or "IES" extension. 3dOP Pro comes with ies type C files from ALLSCAPE preloaded with the program. The SL-23-20MH-BT5-SPT-.IES is selected. This is an in-ground fixture with a 20 watt BT5 lamp in a spot reflector. Note: It is a good idea to create a photometric directory into the Documents directory.

Once the desired file has been selected, select "Open" or double click with the mouse on the highlighted filename. The file will be loaded into 3dOP Pro and displayed as shown below:

The green icon at the center of the grid indicates the 0,0,0 starting position of the fixture.