Super-resolution virtual imaging by micron sized transparent beads (microspheres) was recently
demonstrated by Wanget al. Practical applications in microscopy require control over the positioning of the
microspheres. Here we present a method of positioning and controllable movement of a microsphere by
using a fine glass micropipette. This allows sub-diffraction imaging at arbitrary points in three dimensions,
as well as the ability to track moving objects. The results are relevant to a broad scope of applications,
including sample inspection, microfabrication, and bio-imaging.