go to control panel->Display.
Open it there you should see two monitors.
There are two options.
One is use the two monitor as one big one.
Another is use them as two separate monitors.
Read the information there you can do it.
Open it there you should see two monitors.
There are two options.
One is use the two monitor as one big one.
Another is use them as two separate monitors.
Read the information there you can do it.