Below is a list of each of the PDF optimizer settings and a description of their functions.
|Image Compression||Choose to either retain or convert any image to either a JPEG, JPEG2000, FLATE, or JBIG2.
*Note – Anytime a change is made to “Color Space” or “DPI” the image will have to be re-compressed. When the “No Change” option is selected, PDF Studio will attempt to keep the current image compression format. If it is not supported, PDF Studio will re-compress to the closest matching supported compression.
|Image Quality||Allows the image quality to be adjusted between 10-100%.
|Image Color Space||Choose to either retain or convert the image colors to Grayscale or B&W.
*Note – When the “No Change” option is selected, PDF Studio will attempt to keep the current image color space. If it is not supported, PDF Studio will change to the closest matching supported color space. JPEG images with CMYK color space will be converted to RGB due to a regression bug in JDK 1.7.
|DPI (Dots per Inch) Resolution||Adjust the image resolution of all images that are larger than the option selected
|Alternate Images||Removes alternate embedded image dictionaries that are used for high resolution printing to reduce file size. Only visible images displayed on the PDF while viewing will be kept in the document.|
|Bookmarks||Removes all bookmarks from the PDF document|
|Document Info||Removes any document information located in the document properties (Document->Document Properties) that would include the following:
|Embedded Thumbnails||Removes page thumbnails that are stored in the PDF document. Once removed the page thumbnails will just be rendered each time the document is loaded.|
|Comments||Removes all annotations and comments from the PDF document|
|Links||Removes all links from the PDF document|
|Attachments||Removes any attachments that are stored within the document|
|Form Fields||Removes all form fields that are on the PDF document|
|Metadata||Removes all additional or extra Metadata from the PDF Document|
|Unused Resources||Removes resources that are located within the document but are never referenced by any objects in the PDF document.|
|Flatten Comments||Flattens all annotations including text boxes, shapes, highlights, and stamps directly onto the document so that they can no longer be edited.
|Flatten Fields||Flattens all fields including text boxes, check boxes, radio buttons, combo boxes, list boxes, buttons, & signature fields directly onto the document so that they can no longer be edited. All values within the fields will be flattened as well|
|Merge Duplicate Images||Merges any duplicate images within the PDF so that all objects are referencing the same image resource rather then multiple of the same resource|
|Merge Duplicate Fonts||Merges any duplicate fonts within the PDF so that all objects are referencing the same font resource rather then multiple of the same resource|
|Compress Uncompressed Streams||Compresses any additional PDF elements within the document such as page descriptions that have not been optimized by any other process to further reduce file size|
|Clear Signatures||Removes all signatures that are on the PDF Document but will leave the signature field|