Please refer to the Settings Guide for details.
13.8 Lamp Settings Guide
For details on how to draw parts, and defining the address, shape, color, and labels, please see the parts editing topic.
8.7.1 Editing Parts
On the display unit, shows the ON/OFF state of the device/PLC bit address.
From the [Parts (P)] menu, point to [Switch Lamp (C)] and select [Lamp (L)] or click 
to place a lamp on the screen.
Double-click the placed lamp. The Switch/Lamp dialog box appears.
In [Select Shape], choose the lamp shape. Click [OK].
Set the bit address to turn the lamp ON or OFF.
Click the [Color] tab. In [Select State], choose ON or OFF, then set the [Display Color], [Pattern], and [Border Color] for each state.
Depending on the shape, you may not be able to change the color.
Click the [Label] tab. Define the label to appear on the Lamp. Specify the font type and size, and then in the rectangular field type the text to display. Click [OK].
When you select a lamp and press the [F2] key, you can directly edit the text on the label.