CLIC is the software to calibrate PdB data. The calibration of most projects is carried out with a few interactive procedures and widgets provided within CLIC, so most astronomers do not need to know much about CLIC commands. We recommend however to have a look in the CLIC manual4 at the following commands: help, file, find, list, plot, set x and set y. During the calibration you will become familiar with others, e.g. solve. In general we recommend to read the CLIC manual to have a deeper understanding of the calibration possibilities.
In some of the following sections, paragraphs written with italic fonts are aimed to solve problems that may appear in the calibration. You can skip these paragraphs in a first reading.