Specifies the image toolkit used to create thumbnails from uploaded images. By default, the ImageMagick library and Image::Magick Perl module are used; if your system does not have these, you can use the NetPBM tools instead (assuming that your system has these tools installed). Possible values for this setting are ImageMagick or NetPBM.

Default value: ImageMagick

Example:

    ImageDriver NetPBM