Electron backscatter diffraction (EBSD) is a specialized microscopy technique used to study the crystallographic properties of materials at the micro and nanoscale. It involves directing a beam of electrons onto a sample and measuring the pattern of backscattered electrons to determine the crystallographic orientation and structure of the material. It is commonly used in materials science, geology, and metallurgy to study the microstructure and properties of materials, and requires specialized equipment and training to perform effectively.