How do 'Optimize profile' (optimization) settings affect my files?

JPEG Quality
This sets the level of quality used by NXPowerLite when recompressing JPEG files. The scale runs from 1-9:

  • "JPEG Quality 1" will result in greater reduction of files but will reduce the visual quality of images. 
  • "JPEG Quality 9" will fully preserve image quality but will result in less reduction.

We recommended using our default settings because these offer an excellent balance between file reduction and quality.

Please note: The JPEG Quality setting for both PDF and Microsoft Office files refer to the JPEG images stored within the file. NXPowerLite does not resize stand-alone JPEG files in any of the standard profiles. It can be configured to do so in a custom profile by enabling the resize setting.

Resize images for display at:
Documents often contain very large images, taken with digital cameras for example, which contain far more visual information than will ever be seen by a user in normal use. NXPowerLite can scale these images down to target a particular display resolution.

Delete Private Application Data (PDF)
Applications that create PDFs files, such as Adobe Photoshop or Acrobat, are able to store information within a PDF file that they can use when opening or editing the file. This information can only be used by the application which created the file and is not needed to display a PDF file. For most cases, we recommend deleting this data as it will have no effect on the use of the PDF file.

Subset Embedded Fonts (PDF)
Enabling this feature means only those characters that are actually used in the lay-out are stored in the PDF. If the “$” character doesn’t appear anywhere in the text, that character is not included in the font. This means that PDF files with subsetted fonts are smaller than PDF files with embedded fonts.

Delete cropped areas of pictures (Microsoft Office)
Enabling this feature will trim cropped images within documents so that only the visible portion is stored in the file. This will reduce the size of the files, but users will no longer be able to edit cropped images to reveal the areas that have been removed.

Flatten embedded objects (Microsoft Office)
Enabling this feature will cause embedded objects within Office files to be "flattened", converting them into pictures. This will reduce the size of the files but users will no longer be able to double-click embedded objects to edit them.

For example, a PowerPoint presentation may contain an embedded Excel sheet with a table of figures. Double-clicking the table would normally open Excel to edit the figures, but flattening the document converts the table to a simple picture, meaning the underlying data cannot be edited.

If NXPowerLite has "flattened" embedded objects then a message will be shown under the file name in the Results Dialog. To optimize files without "flattening" embedded objects choose one of the "no flattening" Optimize profiles or a custom profile.

Remove EXIF data (JPEG)
JPEG images normally include extra information (metadata) inside the file such as: Device on which the image was taken or location the image was taken plus many more. By default NXPowerLite will retain this data however, this option enables this data to be removed from each JPEG file.


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