Any light effect is composed of elements that have their own parameters. You can edit the structure of the effect in the Elements panel that is visible in the Advanced workspace's mode.
You can use these buttons at the bottom of the panel (all commands are also available by right-clicking within the panel):
The selected (editable) element is highlighted in gray in the list of the added elements. Its parameters are available in the Element Properties panel.
The order of the elements can also be changed by dragging them up or down.
Adjust the parameters for the selected element in the Element Properties panel. These settings are the same for most elements:
Position & Size. This group contains parameters for adjusting the location and size of the light element.
Color. With this group of the parameters you can change the color and transparency of the selected element, as well as the options for blending with the elements below.
To choose a color from the Select Color dialog box, double click on the corresponding plate. To pick a color from the image or from the applied light effect, left-click on the plate, and the cursor will be transformed into an eyedropper. To clear the plate, right-click on it.
Special Parameters. In addition to the above-mentioned parameters, each element has a group of special settings. Read more about them in the pages describing the elements.