Also, see this extract from the 1.8.8-8 release notes:
We've Hired!
Edoardo Luca Radice is now part of our staff, in charge of writing and improving the official documentation for all PixInsight processes and scripts. He is now starting with this monumental task and his first results are fantastic, which means that we will be able to overcome an important weak point that has been damaging PixInsight since its beginning. See an example of Edoardo's work in the official documentation of the ImageCalibration tool, which he has completed and is now available in version 1.8.8-8 of PixInsight.