Operation Manual

Figure 289: General page of PDF Options dialog
Images section
• Lossless compression: Images are stored without any loss of quality. Tends to make
large files when used with photographs. Recommended for other kinds of images or
graphics.
• JPEG compression: Allows for varying degrees of quality. A setting of 90% works well with
photographs (small file size, little perceptible loss of quality).
• Reduce image resolution: Lower DPI (dots per inch) images have lower quality. For
viewing on a computer screen, generally a resolution of 72dpi (for Windows) or 96dpi
(GNU/Linux) is sufficient, while for printing it is generally preferable to use at least 300 or
600dpi, depending on the capability of the printer. Higher DPI settings greatly increase the
size of the exported file.
Note
EPS (Encapsulated PostScript) images with embedded previews are exported only
as previews. EPS images without embedded previews are exported as empty
placeholders.
Watermark section
• Sign with Watermark: When this option is selected, a transparent overlay of the text you
enter into the Watermark Text box will appear on each page of the PDF.
General section
• Embed OpenDocument file: Makes this PDF easily editable in LibreOffice or similar
programs.
• PDF/A-1a: PDF/A is an ISO standard for long-term preservation of documents, by
embedding all the information necessary for faithful reproduction (such as fonts) while
forbidding other elements (including forms, security, and encryption). PDF tags are written.
If you select PDF/A-1a, the forbidden elements are grayed-out (not available).
• Tagged PDF: Tagged PDF contains information about the structure of the document’s
contents. This can help to display the document on devices with different screens, and
294 | Getting Started with LibreOffice 4.0