Please help ... What is meant by 'hold down' here in this context? Thanks?

Question

Context:

Hold down the [ATR] switch for one second or more.

Answer 1

Favorite Answer

Press and do not release until the time has elapsed.

Answer 2

It means to press or depress the switch.

Answer 3

It means to keep pressure on the switch. 

Answer 4

literal meaning is intended. hold it down.  keep it in the down position  (hold means keep or maintain position).

Answer 5

Press and do not release.