A method of performing therapy on target tissue in a patient's eye of an embodiment uses an ophthalmic treatment system having a light source for producing treatment light and a delivery system for delivering the treatment light to the patient's eye. The method includes steps of: obtaining a sample treatment pattern of spots of the treatment light for projection onto the patient's eye； causing to be displayed the sample treatment pattern； receiving user instruction to add or subtract spots from the sample treatment pattern to produce a new treatment pattern； producing treatment light； and deflecting the treatment light to produce the new treatment pattern for projection onto the patient's eye.
