User guide

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As close to original
Creates files that contain images having the same resolution as the original. Images are compressed
using lossless compression, are not downsampled. This setting will somewhat reduce file size, particularly
in documents containing many large images, and is ideal for cases where image quality is of utmost
importance.
Leave images as is
Images will not be compressed or downsampled. Use this setting when you do not wish to compress or
downsample images, but still wish to perform other optimization tasks, such as removing objects.
Custom
Allows you to specify different settings for various types of images contained within your document, for
example color or grayscale images. Depending on the types of images contained in your document,
available options include:
l Downsample (DPI): Sets whether to use the original DPI, or allows you to choose the DPI to be
used in rendering each image. Setting this to a lower number will reduce the quality of your prin-
ted images, and will also reduce file size
l Compression: Sets the type of compression to use in compressing images. If Automatic is selected,
Nitro PDF will select the best compression type to suit the majority of images within the document.
You can also experiment with different settings to find the optimal balance between file size and
image quality
l Image Quality: If JPEG compression is selected, you can adjust this setting to specify the desired
image quality, depending on how your document will be used. Higher image quality will result in lar-
ger file sizes
Nitro Pro 9 - User Guide