How to get value automatically when I click item column?

[umin-kyaw]

Hello My Dear Sir,

I have a question about the related of getting value.

For example, In my inventory there are many items. After I clicked the item from valid if column in form view to generate receipt, I also fill the number of quantity in quantity column. This is the routine.

But I want to do that when I click the item which I choosed 5 times to get the automatic fill 5 in quantity column.

How to do that?

Please let me know Sir