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preview-latex has a number of methods for generating its graphics. Its default operation is equivalent to using the ‘LaTeX’ command from AUCTeX. If this happens to be a call of PDFLaTeX generating PDF output (you need at least AUCTeX 11.51 for this), then Ghostscript will be called directly on the resulting PDF file. If a DVI file gets produced, first Dvips and then Ghostscript get called by default.
The image type to be generated by Ghostscript can be configured with
M-x customize-variable RET preview-image-type RET
The default is ‘png’ (the most efficient image type). A special setting is ‘dvipng’ in case you have the ‘dvipng’ program installed. In this case, ‘dvipng’ will be used for converting DVI files and Ghostscript (with a ‘PNG’ device) for converting PDF files. ‘dvipng’ is much faster than the combination of Dvips and Ghostscript. You can get downloads, access to its CVS archive and further information from its project site.
This document was generated by Ralf Angeli on January 13, 2013 using texi2html 1.82.