The Beam event will produce an intense static beam at the position determined by its target world. You need to assign a target world in the Beam event, then move it around in the setup. The size and geometrical correction sliders won't affect the beam as it is just a dot, but the position sliders can move it around. This way you can have a lot of bounce beam effects while not having to change position in all of them each time you move the projector half a millimeterJust adjust the target world settings and it's good.
This is where you are limited with Basic as you only have 8 target worlds, so one for full size and one for graphics leaves you at 6 bounce beam locations...