2. Click on the Clock in the lower right corner. Then click the Gear icon for Settings
3. On the left side menu go to Device, then to Display.
4. It should look something like this.
5. Here you can see it shows all the detected displays, has a mirror screen button, and you can see below that Mirror button where it shows which monitor is currently selected and you can move them around relative to each other on that diagram.
Below that you can adjust settings for that particular monitor like the Resolution or the Display size, which makes everything on screen larger or smaller.
Below that you can adjust settings for that particular monitor like the Resolution or the Display size, which makes everything on screen larger or smaller.