question on osds
 

After watching several videos with people using osds, how are they changing their screen display from the ground? I am an absolute RC virgin and have many questions.

Some OSD's not all have the ability to switch screens via switch on the TX, for example i use a Cyclops Tornado osd and can toggle between 3 screen selections via a 3 position switch.

are you referring to a 3 position switch on your transmitter?

Yes, a 3 position switch on the transmitter.