An elegant, easy-to-use program for visualizing and understanding diffraction patterns from single crystals. SingleCrystal provides real-time display of simulated electron diffraction patterns and reciprocal lattice sections - as well as stereographic projections of planes, traces, zones and zone axes. You can rotate crystals with the mouse, or tilt controls, and observe how the diffraction pattern changes. Screen tools allow easy measurement and indexing of reflexions, as well as the display of phase information for scattered beams. SingleCrystal is designed to work with CrystalMaker, allowing users to visualize crystal structures then with a single menu command, display the diffraction pattern in SingleCrystal. The program can also be used as a stand-alone application, reading from CrystalMaker crystal files. SingleCrystal is a Universal Binary application that runs natively on both PowerPC- and Intel-based Macs.