• Which format: HTM or PDF?
• Adobe®  Acrobat®  Reader®™
• Why is the font so large in the PDF files?
• Adjusting the size of the on-screen pages
• Troubleshooting the printing of HTM files

This book is being made available in two different formats, PDF and HTM. The two versions are word-for-word identical. Of the two, PDF (Portable Document Format) is clearly preferable. In nearly all cases – with the notable exceptions of chapters 8 and 11 (which include large graphic images) – the PDF files are smaller and will download more quickly. They are also clearer to read on one's computer monitor and lend themselves to printing two pages per sheet of paper. (If, however, download time is of especial concern, one can download all but chapters 8 and 11 in their PDF versions, and those two chapters in their [smaller] HTM versions.)

PDF files require Adobe Acrobat Reader for viewing on-screen and for printing. Copies of this invaluable program are available free from Adobe and are offered in many versions, for various operating systems (Windows, Macintosh, UNIX, etc.) If you have not already done so, you should download and install the version of Acrobat Reader tailored for your computer.

The font has purposely been made large so as to allow two pages to be printed on one sheet of paper. Printing two pages per sheet requires that your software scale-down [i.e. reduce the size of] each page. If the font were normal size, the reduced version would be extremely difficult to read.

To print two pages per sheet of paper, in the "Page setup" setting on your computer, chose "Multiple page: 2-in-1" or "Print 2 up". You may need to experiment a bit, especially with the 'orientation' setting: portrait () or landscape (). Some software will automatically print in landscape orientation when '2-in-1' is chosen; others will need to be set to landscape explicitly. (In the software installed on my own computer, for example, when I select "2-in-1", the program says "portrait" and then proceeds to print in landscape. Go figure. But, as I say, you may need to experiment a bit.) Try printing only a few pages initially, until you get the hang of the peculiarities of the print software installed on your own computer.

You may find the font in the PDF files so large as to make them difficult/uncomfortable for you to read on your monitor. Fortunately Adobe Acrobat Reader allows you to change the size of the page on-screen. In the toolbar, there is an icon that looks like this:

(The percentage displayed in the box may differ on your computer.)

Click on the downward-pointing arrow, , and a menu will appear:

Simply choose a width that is more comfortable for you.

Some of the chapters have embedded graphics images (e.g. the figures in chapter 8 and special symbols [such as ""] in other chapters). The very latest versions of some browsers now provide the options of saving a downloaded HTM file "complete"[ly]. That is, if you specify that the file is to be saved to your hard drive "complete", the browser will save both the HTM file and all the embedded graphics files. If you later reload (re-open) the file from your hard drive (for viewing or printing), it will be complete, i.e. will contain all the needed graphics images.

If, however, you are using an older browser or fail to specific a 'complete' save on a newer browser, the browser will save to your hard disk only the HTM files. If you then later try to view or print the saved HTM file, the graphics images will be lost and a symbol indicating a missing image will appear instead. Thus a line which should print this way:

That Clover is not a dog does not prove that Clover is not some sort of thing, , which Rover also was ...

may, instead, print this way:

That Clover is not a dog does not prove that Clover is not some sort of thing, , which Rover also was ...

There are four ways to avoid this difficulty:

• Download the PDF files rather than the HTM files. PDF files are complete. The embedded images are parts of the PDF file itself.
  
  
• Download ZIPped versions of the HTM files. ZIPped versions, like PDF files, are complete. They also are much smaller, and will download more quickly, than regular HTM files. They do require, however, additional software (e.g. StuffIt Expander [freeware for Mac, Windows, Linux, and Solaris] or ExtractNow [freeware for Windows] or any similar utility) to unZIP them.
  
  
• Use the newest version of Internet Explorer or Firefox and take especial care when downloading HTM files to specify that the file is to be saved "complete".
  
  
• Download the graphics images separately. Click here to transfer to a page where all the graphics files are available – both individually and in a complete set – for download.