How do you use the boom operator?

when I lift somthigs of an equpmint can control and check where you want put 

For example Telescopic forklift. by operating in nice and safe manner at all time

as an Excavator operator you can use boom operator by manipulating the joy stick either to the left or right.

Everyday must be check and make sure it is in good condition before use the concrete pump, set the concrete pump in a safe place and operate it with care before pouring, after finish in pouring clean the concrete pump.