mesh data

hi
anyone can tell me how to get volume of each elements in comsol?, is it possible to get element numbers in comsol?, I hope 'dvol' give the element volume scale factor, from manual I understood its value of Jacobian not the volume of element.From previous forums I understood that we can export mesh data. since I am new to comsol not able to locate it in comsol GUI.
******improtant****
Can anyone give me the step by step procedure to get the volume of each elements in comsol?