Dell E2014T 19.5 Multi-Touch Monitor with LED - Manual (Page 47)

Appendix
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4. Identify your video card manufacturer (such as NVIDIA, ATI, Intel, and so on)
from the description at the top of the window.
5. See the computer or video-card manufacturer’s website for updated drivers.
After installing the updated drivers for your video card, try setting the resolution to
1600 x 900 again. If you are unable to set the resolution to 1600 x 900, contact
the manufacturer of your computer or consider purchasing a graphics adapter
that supports the resolution of 1600 x 900.
Setting up Dual Monitors
Connect the external monitor(s) to your computer and follow any of the below setup
method.
Using keyboard shortcut
1. Press the Windows key+
on your keyboard.
2. While holding down the Windows logo key, press
to toggle between the
display selections.
Windows Vista and Windows 7
Windows 8 / Windows 8.1