Lenovo ThinkPad X240 User Manual page 51

Your computer can support a maximum video resolution of up to 2048x1536 (with an external monitor
connected to the VGA connector) or up to 2560x1600 (with an external monitor connected to the mini
DisplayPort connector), provided that the external monitor also supports that resolution. For more
information about the external monitor, refer to the manuals provided with the external monitor.
You can set any resolution for either the computer display or the external monitor. When you use both at the
same time, the resolution of both is the same. If you set a higher resolution for the computer display, you
can see only part of the screen at a time. You can see other parts by moving the image with the TrackPoint
pointing device or another pointing device.
You can move the display output to the computer display, the external monitor, or both in the Display
Settings window.
Connecting an external monitor
To connect an external monitor, do the following:
1. Connect the external monitor to the VGA connector or the mini DisplayPort connector of your computer.
2. Connect the external monitor to an electrical outlet.
3. Turn on the external monitor.
4. Change the display output location by pressing F7. This enables you to switch between viewing output
on the external monitor, the computer monitor, and both monitors.
Note: If your computer cannot detect the external monitor, right-click on the desktop, then select Screen
resolution. Click the Detect button.
Setting the external monitor type
To set the external monitor type, do the following:
1. Connect the external monitor to your computer, and then connect the monitor to an electrical outlet.
2. Turn on the external monitor.
3. Right-click on the desktop, and click Screen resolution.
Note: If your computer cannot detect the external monitor, click the Detect button.
4. Select the external monitor and set Resolution.
5. Click Advanced Settings.
6. Click the Monitor tab. Check the monitor information to make sure that the monitor type is correct. If it
is, click OK to close the window; otherwise proceed with the following steps.
7. If more than two monitor types are displayed, select Generic PnP Monitor or Generic Non-PnP
Monitor.
8. Click Properties. If you are prompted for an administrator password or confirmation, type the password
or provide confirmation.
9. Click the Driver tab.
10. Click Update Driver.
11. Click Browse my computer for driver software, and then click Let me pick from a list of device
drivers on my computer.
12. Clear the Show compatible hardware check box.
13. Select the correct manufacturer and model for the external monitor. If you cannot find your monitor on
the list, stop the installation of this driver and use the driver shipped with your monitor.
14. After updating the driver, click Close.
.
Chapter 2 Using your computer
35