Lock Screen question

[3d1l]

Hi,

I want the lock screen to activate immediately after pressing the power button, but only if I press the power button. I don't want the lock screen to activate under any other circumstances, even if the display goes to screen/power saver. I know that I can set the time that it takes to activate the lock screen after the phone turn off the screen but that's not what I want, again I press the power button lock screen activates instantly, I don't press the power button lock screen never activates.

How can I do that?

Regards.

 

[VW Maverick]

Welcome.
What device do you have?

Mav.

 

[3d1l]

T-Mobile LG Optimus L90 d415e
Android 4.4.2 KitKat