From menu on the left select e.g . "Steel and materials based he Fe" and from next menu
choose e.g . "Case Hardening Steel" and then yet select information source.
On the left you see offer for microstructures and choose e.g, "Electron micrographs" and onward
label of material, e.g . "En 32A" and onward the condition of material, e.g .
"920 C 10 min/10% iced brine solution". On the right  show, in this case, two pictures of microstructure and choose one of them, e.g . picture with number 2
After activation this picture will show correspondent microstructure with description.
Microstructure can be enlarge. Manner of increase the picture you learn by activate buttons with question mark.