Button INSERT: How add more of one line in AB (CRM UI)

Hi Guys,

I have a requirement, i need is that in the Items assignment block, the Insert button allow me to add more one line, in this case insert 10 lines at a time.

My component is BT115IT_SLSO/Items, in the Event Handler,  the event EH_ONINSERT  is inactive.

Could you give me an idea?

Regards