I just wanted to point to a new feature on our website that makes finding parameters and their documentation more convenient:
contains a list of all current ASPECT parameters, their types and default values, sorted in a tree structure, and you can interactively click on parameters to read their documentation. It will be updated in sync with the online manual at http://www.math.clemson.edu/~heister/manual.pdf (about once a month if I remember correctly) and is linked from the start page under
Info -> Parameter Documentation. I find this structure far more convenient than looking up parameters in the manual, an existing parameter.prm, or the source code. The same file is also available in every sufficiently new ASPECT source directory (under doc/parameter_view/parameters.xml) and you can also open it locally in Mozilla Firefox (Google Chrome currently does not support the local version).
Let me know what you think about the feature and about suggestions for improvements.