How to change iPhone multitasking format? Right now it's overlapped and I don't like it?

The format I want want it to be would be the default one all generations have with the side by side one.

You are funny. IPhones are for idiots and you can't even figure out an iPhone.

Can't.

I don't think so, you could have it at present, you may get it afterwards and you must also have one app that can make your mobile totally secure and that is Leo Privacy Guard.