The above process which u have told is correct. But i am giving some example for my question then u will give me answer.
Item Name is: Stepler pins
I have entered this item under units of measurement "Numbers". And also passed some entries related to that item.
After that i want to change the units of measurement to that particular item as a "Boxes" inplace of "Numbers". How it is possible? If i will go to chage the units of measurement for that item "the curser will jumping the units at Stock item alteration window"