7.2.11. Thumbnails

The thumbpdf package by Heiko Oberdiek installs the Perl program thumbpdf on your system. With the help of thumbpdf and Ghostscript (which should also be installed), you can create thumbnails for the PDF document (to be seen when you click on the “thumbnails” register card in Acrobat® Reader). Thumbnails are embedded images of the document's pages, drawn in small size and resolution. Their purpose is to facilitate navigation through the document (of course only if the PDF viewer supports them).

You need at least Ghostscript 5.50 in order to be able to use thumbpdf. You need to declare its use in the jadetex.cfg file (see Section 4.4 and Section 7.2.12) as follows:

\usepackage[pdftex]{thumbpdf}

The PDF document with thumbnails is created in a three-pass process:

1. The PDF file without thumbnails is created first.

2. thumbpdf is called and given as argument the basename of the PDF file. It creates the thumbnails in a file with the same basename and the ending .tpt.

3. The PDF file is created again. Through the \ usepackage instruction above, pdfjadetex searches for a .tpt file in the current directory and uses it to embed the thumbnails in the PDF file.

If the parameter use_coolthumbs is set to 1 in lyxtox (that's currently the default), the thumbnails will be generated using the coolthumbs script (see Section 4.15), which in turn will call The GIMP to create smooth, anti-aliased thumbnails. See the Linux LaTeX-PDF HOW-TO for the details of the inner workings of coolthumbs.

See also Section 7.1.4.7 for the PDF document creation process.