A Light Layer allows setting a light source to illuminate other video and graphic layers. With the help of a particular effect (Aeon FX tab > Lighting folder) another layer can "receive" this light and hence be illuminated. Without an lighting effect they will be rendered as always.
1a. Create a Light Layer (right-click on Site > Add Device > Add Light Layer)
1b. Assign a texture to the light, e.g. a white image from the Stock Assets.
2a. Assign a texture to a common video or graphic layer.
2b. Drag a Lighting FX from the Aeon FX tab onto this layer. Right-click into the effect's "Media" field, choose "Share Layer Texture" and select the respective light source. Now, the chosen light illuminates the video / graphic layer.
The following chapters include information about DMX Control, addressing customers who wish to remote control a light layer with a lighting desk via DMX or Art-Net. If you like to use the Widget Designer instead, please refer to this parameter list.
The according inspector information is described here.
Even though it is possible to add as many light layers as you wish,keep in mind that calculating light effects requires a lot of the system's performance. Depending on your settings and of course your hardware, three lights might be already the limit.
If you wish to see the spanned light cone in your Preview window, make a right-click and toggle the light wireframes on. Make sure that under "Show Handles" "Show in Local Node" (or ...Client) is enabled. Please refer to this chapter if you wish to know more about wireframes and handles.