How To Configure Display Zoom on iPhone 6/iPhone 6 Plus:
In order to activate Display zoom feature on your new iPhone 6, all what you have to dos is going to Settings > Display & Brightness > View.
You should see something like this:
Now you will be able to set the Display zoom as standard or zoom, so set it as zoomed.
As you can see in the screenshot below, the Display Zoom is currently set as Zoomed, to switch back to Standard mode, tap on the Standard tab, and tap on Set. The screen will go blank for a few seconds, and change the resolution to Standard.
Right now you may have two questions you want to ask, the first one is: What is standard mode and the second one, what is zoomed mode.
What is Standard mode?
In the standard mode, the iPhone 6 Plus runs at 2208 x 1242 pixel resolution, which at 3x resolution works out to 736 × 414 points.
In the standard mode, the iPhone 6 runs at 1334 × 750 pixel resolution, which at 3x resolution works out to 667 × 375 points.