iPhones are hard to use

This is a treasure trove of things even I didn't know that the iPhone could do. I've been in the iOS ecosystem for about 6 years now and here are three simple things:

• Passcodes can be passwords
• Ask Siri 'Get me home'
• Ask Siri 'Where am I?'

And then there's the WTF, why didn't anybody tell me about these two?!

• Settings > Phone > Announce Calls - perfect for when I'm out for a walk
• You can select multiple rows of photos with a long press and swipe (not 3D touch)

The one thing I have no idea about is this though:

Show a magnified absolute-centred duplicate of nearly anything onscreen you cannot actually manipulate, like whatever is in the title bar. (Try pressing and holding on the battery icon.)

I'd be really interested to know what this means as zooming is a feature I really like but whenever I have it enabled I invoke accidentally and then it persists.