Dell Latitude XT (Late 2007) - Manual (Page 97)

Using Your Tablet-PC With a Projector 97
Considerations for Display Resolution and Aspect Ratio in Clone Mode
If the projector has a lower display resolution and aspect ratio than the
Tablet-PC display, then the Tablet-PC graphics subsystem uses the lowest
display resolution and aspect ratio. Changing to a lower display resolution and
aspect ratio alters the image quality.
For example, if the Tablet-PC has a display resolution of 1280 x 800 pixels
with a 16:10 aspect ratio and the projector is using a 1024 x 768 display
resolution with a 4:3 aspect ratio, then you may notice that:
• The projected image is not as sharp as it would be with a 1280 x 800
display resolution. The loss of sharpness is particularly noticeable when
reading text.
• Round objects appear flattened. This alteration is a result of shifting from
the 16:10 to the 4:3 aspect ratio.
Extended Desktop Mode
Extended desktop mode enables you to configure two displays that each have
their own attributes. You can use the Tablet-PC display in tablet mode with
portrait orientation using a 1280 x 800 resolution, and the projector can use
the standard landscape orientation at a lower resolution and aspect ratio.
When using extended desktop mode, you start applications on the Tablet
- PC
and then "drag" the applications that you want to be viewed from the
projector to the extended desktop. Extended desktop mode is useful when
you want to maintain user activity on the Tablet-PC without displaying this
activity with the projector.
NOTE: When you initially connect the Tablet-PC to a projector, the Windows
operating system asks you to specify default display settings. To enable extended
desktop mode, select Show different parts of my desktop on each display
(extended). To send the Tablet-PC display image to the projector, use the <Fn><F8>
key combination. You can then "drag" the applications you want to project from the
Tablet-PC to the extended desktop (the projector). You can change the default
display settings at a later time.
Changing the Display Settings for the Projector
To change the default display settings:
1 Open the ATI CATALYST ® Control Center:
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