questions about „Buttons"

[Guest buzzman]

Hi

I have some questions about „Buttons“…

For me, the on/off (power) button is too small and sometimes hard to press so I wish to use for example the volume button to do the same. Is that possible?

First:

Does it matter in terms of battery life if I press the On/Off button for standby or if I lock the device by pressing the “red” button?

Second:

How can I define the hardware buttons? I don’t get along with the “buttons” menu in the settings and I couldn’t figure it out with the “AE Button” tool.

Thanks!