I use 2 displays (1920x1080 touchscreen on the left, 1440x900 on the right). If I ever use

```
xinput set-prop "Acer T230H" "Coordinate Transformation Matrix" 0.566 0 0 0 .71111 0 0 0 1
```

(as matrix value)

```
0.566 0 0
0 0.71111 0
0 0 1
```

the x-coordinate is caluclated correctly, but the y-coordinate is must be multiplyed by ~1.2 to be correct.

Where do i have to place my 1.2?