dom.setTracingImageOpacity()

Availability	3.0
Description	Sets the opacity of the tracing image.
Arguments	`opacityPercentage`
	The argument must be a number between 0 and 100.
Returns	Nothing.
Enabler	`dom.hasTracingImage()`
Example	The following code sets the opacity of the tracing image to 30%:
	dw.getDocumentDOM().setTracingOpacity('30');