How to swap monitor positions when using an extended monitor?

Question

I'm using an extended monitor. Currently, when viewing the display monitors in the OS, I see they are listed as below.

1 2

My problem is that my extended monitor is not on my right hand-side as it says - i.e. physically I place it on the left. What I want is to change the posistions listed in the OS to be

2 1

How can I do that?

Answer 1

Wow... It's so naive of me. After posting the question, I try dragging the monitor 2 and drop it on the left of monitor 1 and everything is right what I expect.

So simply, use drag 'n' drop to deal with the mornitor positions.