Geometry module of SALOME is destined for:
It is possible to easily set parameters via the variables predefined in SALOME notebook.
Geometry module preferences are described in the Geometry preferences section of SALOME Geometry Help.
Almost all geometry module functionalities are accessible via Geometry module Python Interface
You can find the answer to some Frequently Asked Questions in this page:
There are also additional reference documents for Geometry module that can be useful.