If you need to enter a font name manually on the Fonts panel of the Adobe PDF Settings dialog box, you can use a PDF to find the exact spelling of the name.
You can create a printable preview of your document that substitutes default fonts for any text formatted in fonts that are available on your local machine but are not embedded in the PDF. This can help you decide whether or not to embed those local fonts in the PDF, to achieve the look you want for your document.
When converting a PostScript file to PDF, Distiller needs access to the file’s fonts to insert the appropriate information in the PDF. Distiller first searches the PostScript file for Type 1, TrueType, and OpenType fonts. If the font isn’t embedded in the PostScript file, Distiller searches additional font folders.
Distiller searches the following font folders in Windows:
/Resource/Font in the Acrobat folder
/Windows/Fonts
Distiller searches the following font folders in Mac OS:
/Resource/Font in the Acrobat folder
/Users/[user name]/Library/Fonts
/Library/Fonts
/System/Library/Fonts
The Acrobat installation includes width-only versions of many common Chinese, Japanese, and Korean fonts, therefore Distiller can then access these fonts in Acrobat. Make sure that the fonts are available on your computer. (In Windows, choose Complete when you install Acrobat, or choose Custom and select the Asian Language Support option. In Mac OS, these fonts are installed automatically.)
Fast Web View restructures a PDF document for page-at-a-time downloading (byte-serving) from web servers. With Fast Web View, the web server sends only the requested page, rather than the entire PDF. This is especially important with large documents that can take a long time to download from a server.
Check with your web master to make sure that the web server software you use supports page-at-a-time downloading.To ensure that the PDF documents on your website appear in older browsers, you may also want to create HTML links (versus ASP scripts or the POST method) to the PDF documents and use relatively short path names (256 characters or fewer).
Verify the Fast Web View Preferences setting
Follow this procedure to make sure that you have Acrobat set up to enable Fast Web View during the PDF creation process.
Use this procedure after you have verified your Fast Web View Preferences setting and checked the PDF properties to be sure that the file is not already enabled for Fast Web View.
Choose Document > OCR Text Recognition > Find All OCR Suspects. All suspect words on the page are enclosed in boxes. Click any suspect word to show the suspect text in the Find Element dialog box.
Choose Document > OCR Text Recognition > Find First OCR Suspect.
You can use Acrobat to recognize text in previously scanned documents that have already been converted to PDF.
Acrobat scanning accepts images between 10 and 3000 ppi. If you select Searchable Image or Full Text & Graphics for PDF Output Style, input resolution of 72 ppi or higher is required, and input resolution higher than 600 ppi is downsampled to 600 ppi or lower.
On the Color/Grayscale menu in the Optimization Options dialog box, apply lossless compression to a scanned image by choosing CCITT for black-and-white images or Lossless for color or grayscale images. If this image is appended to a PDF document, and the file is saved by Save, the scanned image remains uncompressed. If the PDF document is saved using Save As, the scanned image may be compressed.
For most pages, black-and-white scanning at 300 ppi produces text best suited for conversion. At 150 ppi, OCR accuracy is slightly lower, and more font-recognition errors occur; at 400 ppi and higher resolution, processing slows and compressed pages are bigger. If a page has many unrecognized words or very small text (9 points or smaller), try scanning at higher resolution. Scan in black and white whenever possible.
When Recognize Text Using OCR is disabled, full 10-to-3000 ppi resolution range may be used, but the recommended resolution is 72 and higher ppi. For Adaptive compression, 300 ppi is recommended for grayscale or RGB input, or 600 ppi for black-and-white input.
Pages scanned in 24-bit color, 300 ppi, at 8-1/2–by-11 inches (21.59-by-27.94 cm) result in large images (25 MB) prior to compression. Your system may require 50 MB of virtual memory or more to scan the image. At 600 ppi, both scanning and processing typically are about four times slower than at 300 ppi.
Avoid dithering or halftone scanner settings. These can improve the appearance of photographs, but they make it difficult to recognize text.
For text printed on colored paper, try increasing the brightness and contrast by about 10%. If your scanner has color-filtering capability, consider using a filter or lamp that drops out the background color. Or if the text is not crisp drops out, try adjusting scanner contrast and brightness to clarify the scan.
If your scanner has a manual brightness control, adjust it so that characters are clean and well formed. If characters are touching, use a higher (brighter) setting. If characters are separated, use a lower (darker) setting.
