Decomposition Levels:Level 1
: Only divided once. So only two components.Level 2
: Radical Decomposition. The character gets decomposed into its lowest radical components. For the complete list visit the Radical wikipedia page
: Graphical Decomposition. Shows all the strokes & lowest level of components that make up the character.
If you see questions marks or too many "block" characters, especially when it comes to level 3 decomposition you might need the correct font