So with matched betting you are pretty much always laying, so you will be using the pink column.
The 1×2 just means the winner market of game. 1 refers to the first team to win. X refers to a draw, and 2 refers to the second team to win.
So for example if you see a match as I have linked in this comment.
St Helens are 1.25 to lay. The draw is 110 to lay. The Catalans Dragons are 6.60 to lay.
Hope that makes sense?