I accidentally discovered 'convert'. It is a command line utility. Changing a file from png to gif works like this convert aaa.png aaa.gif Amazingly simple, powerful and effective. I've since discovered it has an amazing list of options convert --help a manual file:///usr/share/doc/ImageMagick-6.2.8/www/convert.html and a web site http://www.imagemagick.org/ Does anyone have suggestions for a GUI which works for Centos 5.6 ? In production I run the command line program from PHP with 'exec'. Thank you, Paul. Currently automatically, rotating when necessary, downsizing photographs to 900 pixels wide (the software calculates the height) and labelling them with the file reference and photograph date - all in one quick operation. Mind boggling options, more than I've ever seen in similar software. Really amazed :-) _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos