Why? I believe there's at least three ways to turn your phone off right now, why do you need another one? As far as the magnifier, why don't you just set it for triple tap to use the magnifier?
Let me see if I can explain myself a little better. Let's say you have the screen timeout set for 30sec. and you have to show someone something on your phone that will take quite a few minutes to read and understand. 30 secs after you give the other person your phone the screen times out and goes black. There is one way to prevent this from happening and that is to set the screen timeout to something like 10 minutes. To prevent all the fumbling back and forth with the phone, will it not be better to have a way to set the screen timeout to infinity so there will no interruptions with the screen going dark and you can reset it when you get your phone back in your hands?
The screen can be turned off with two screen tap gestures or quickly pressing the power button once. Placing a button in the quick panel would make the procedure redundant. Using those two methods alone can wake, or turn off the screen.
As far as magnification, go to settings/Accessibility/Vision enhancements/Magnification and go from there to create shortcuts or gestures to have the function the way that feels best for functionality. Clicking on Magnification type will offer different choices if that is toggled on for use.
