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The default value for each of the predefined conversion controls allows the print
driver to choose the best method based on the nature of the image.
For monochrome images, you can choose from
ZIP
,
CCITT Group
and
Run
Length
encoding.
CCITT
(International Coordinating Committee for Telephony and Telegraphy)
compression method works best for black-and-white images made by paint
programs and 1-bit scanned images.
Run Length
produces the best results for images that contain large areas of
solid white or black.
ReSample
Select or clear the
ReSample
setting. Resampling changes the pixel dimensions
(and thus the display size) of an image.
If you choose to ReSample, specify either
DownSample
or
SubSample
from the
pull-down menu. The default setting is
DownSample
.
Downsampling decreases the number of pixels in the image. Each pixel it places
has the average value of all the pixels it replaces.
Subsampling chooses a pixel in the center of the sample area and replaces the
entire area with that pixel at the specified resolution.
Resolution
If you resample images, you can specify a resolution for downsampling or
subsampling.
Factory Settings
The
Factory Settings
button automatically returns compression settings to their
original values.
New
Click the
New
button to create a new conversion control.
Delete
The
Delete
button removes the currently selected conversion control.
Default
This returns supplied controls to default values and removes user-defined
controls.
Security
You can add passwords to PDF files you create and prohibit or allow actions, such
as printing, extracting content and editing. Choose a standard control and click
Advanced
to specify passwords and permissions.
