Analysis box tab
MarvinSketch can calculate some basic properties for your structures, which can be pasted into your drawing.
The calculations update upon modification except if they applied to a selection. For more information see Analysis Box
You can set the properties you want to be displayed and their order as well.
Calculated properties:
-     Name 
-     Traditional name 
-     Molecular weight 
-     Formula 
-     Exact mass 
-     Dot-disconnected formula 
-     Isotope composition 
-     m/z distribution 
The decimals setting applies to the exact mass value only.
By default the value of molecular weight is set to three decimal places.