Using drawing tools to manually create graphs and diagrams can be a slow and convoluted process. The Graphviz toolbox offers a faster way. Based on a short text with the information for the graph, Graphviz quickly generates a neat drawing.

GIMP is a powerful tool for improving digital photos. We’ll explain how to crop pictures, simulate depth of field, and correct perspective.

If you need to lay out a text document, you can opt for a WYSIWYG application, like OpenOffice, or a genuine layout system such as TeX. TeXmacs combines the advantages of both approaches: premium document quality and intuitive controls.

An ICC color profile ensures that an image always looks the same – regardless of the output device. The free Argyll CMS software package lets you create color profiles in Linux.

Klaus Knopper is the creator of Knoppix and co-founder of the LinuxTag expo. He currently works as a teacher, programmer, and consultant. If you have a configuration problem, or if you just want to learn more about how Linux works, send your questions to: klaus@linux-magazine. com

Nvidia has turned down requests for an Open Source graphics driver.

GIMP offers plenty of options for creating custom text effects. We'll show you how to sweeten your text with bold outlines, tasty color, 3D effects, curves, and more.

Red Hat's David Airlie reports in his blog that a simple hack allowed him to develop an X server without root privileges in the course of just one afternoon.