Archaea, Bacteria and Eukaryota form the three domains of life. Eukaryotic cells contain a nucleus and other membrane-bound organelles. The cells of archaea and bacteria in contrast are formed by a single compartment that is surrounded by the plasma membrane (Gram-negative bacteria have an additional outer membrane). The objective of this project is to visualize biological cells and highlight by a user selected sub-cellular compartments in a way that they stand out from the un-selected ones.