I have many steps but cannot walk a mile, I lean against the wall and stay there for a while. What am I, that helps you reach places up high?

The quick whisper of scissors, a gentle break in the thread, this sound marks a new beginning or a sudden end.

I’m an ace in the garden Though, I’m shaped like a leaf.

Tear one off and scratch my head, what once was red is black instead.

In origins I was not in existence; this tube based system required manual assistance. Then a clicker came by, connected by string; until infrared changed the scene. My onomatopoeic name changed to this singular six letter answer, all about control.