PDF (Portable Document Format) – is a file format created by Adobe Systems for document exchange used to create electronic editions using the Adobe Acrobat package. The PDF format is a file text format that is used to publish documents on any platform and OS. The PDF document contains one or more pages. Each page may contain any components: text, graphic and illustrations, information, that provides navigation across the document.

 

 

 

PDF uses various compression methods to reduce the size of the file. To compress the text, the LZW ("Flate") algorithm is used. To compress pictures and omages, the JPEG or LZW algorithms are used. The JPEG algorithm is the compression with loss. It is recommended for full-color illustrations and images. The LZW algorithm is a lossless compression, it is recommended for illustrations and images with a small number of colors, for example graphics, chart, and schemes. To ensure the independence from the PDF fonts, the file contains a description for each font used in the document. The description includes the name, size, style and other font options. In the view document mode, if the font described in the document is available, then it is used. If the font is not available, it is replaced with a similar one with the same size and other characteristics. Fonts can be embedded in a document. This greatly increases the size of the file, but ensures that the document will be correctly displayed on any computer.

 

Export options in PDF

 

 

The checkbox All enables processing of all report pages.

The checkbox Current Page enables processing only the current (selected) report page.

The checkbox Pages has the field. This field specifies the number of pages to be processed. You can specify a single page, several pages (using a comma as the separator) and also specify a range by defining the start page and end page range separated with "-". For example, 1,3,5-12.

 

The Image Resolution is used to change DPI (image property PPI (Pixels Per Inch)). The greater the number of pixels per inch is, the greater is the quality of the image. It should be noted that the value of this parameter affects the size of the finished file. The higher the value is, the greater is the size of the finished file.

The Image Resolution Mode parameter. Depending on the values of this parameter, a certain resolution will be applied to the images in the report:

Exactly - all images after conversion will have the resolution specified in the Image resolution option;

No more than. If the original resolution of the image is less than specified in the Image resolution parameter, then the resolution of the image after the conversion of the report will be equal to the original one. If the original resolution is greater than the one specified in the Image Resolution settings, the image resolution will correspond to the value of the Image Resolution settings.

Auto. The image after the report is converted will have the original resolution.

 

The Image Compression Method allows defining the mode of image compression in the PDF file. The following modes are available:

JPEG - compression with loss;

Flate - compression without loss;

Simple - monochrome mode without dithering;

Ordered - monochrome image with dithering;

FloydSt. - the most precise monochrome mode with dithering.

 

 The option Allow Editable provides the ability to enable the mode in which, after exporting, it will be possible to modify components with the Editable property enabled. If No is set, then you can edit all components, unless it is not limited with safety parameters. If you select Yes then you can only edit components with the Editable property enabled.

 

 

 The Image Quality will be available only if you select the compression method JPEG. This option allows you to change the image quality. Keep in mind that if you change this option the size of the finished file will increase. The higher the quality is, the larger is the size of the finished file.

The flag Embedded Fonts provides the ability to embed the font files into the created PDF file. If this option is enabled, then when you export a report, the files of all the fonts used in the report will be included in a PDF file, and fonts in the resulting file will be displayed correctly in any PDF viewer. If the property is disabled, then to display the file correctly all the fonts used in the report must be installed on the computer.

 

 

The flag Export Rich Text as Image as Image enables/disables the conversion of the RTF text into the image. If the option is disabled, the Rich Text is decomposed into simpler primitives supported by the PDF format. The Rich Text with complex formatting (embedded images, tables) cannot always be converted correctly. In this case it is recommended to enable this option.

 

 

The flag PDF/A Compliance enables/disables support for standard long-term archiving of electronic documents. Compliance ensures that the document will have the same look in later versions of Adobe Acrobat. Enabling this option will also automatically include the options Embed Fonts and use Unicode.

The Document Security.