How to steal? (Assassin's Creed: Syndicate)

So it is necessary to clamp "e"

on "E" in stealth mode and behind

I found a video on YouTube, but I don't know how to do it, since it shows:

E must be pressed and held when the inscription appears.
I press c - Evie sits down in stealth mode, sneaks up behind, but nothing appears, no inscriptions.
I just walk up from behind and nothing appears.

Try Jacob to get through. He was in the Ghost Club

Damn, I spent 2 hours of time, but the inscription (the letter E in the square) does not appear in any way.
Please describe someone in detail about the process.
How to rob?
Does the character have this skill right away or will it appear later?

JohnFender
In general, Jacob refused to join me, and Evie happily agreed. I go through almost all missions to her.

Walter_Stolz
Try to change the key.

Genom94
And the point is to change it. Other actions work fine (Locking chests, Burn cards, Kidnap, etc.)

What must be pressed to be able to steal?
E is already the process itself.

Walter_Stolz
You do not need to press anything, you come close to it, an icon appears, you hold E
PS Before you write: "but change the meaning", you first try, suddenly it will help.

You can't steal, cut out and pick pockets.

smoke bomb in stealth mode and knockout and robbery