mitchellworks
You/we cannot do that, but Lithiums Professional Services Team have means to do that by adding custom columns to these widgets (have seen it done). These custom columns are simply custom components (that you can then also see in studio) but to add them to the default OOB components you need to contact PS (I don't think support will do that...). I think they call them "Row Templates" internally, but don't quote me on that!
Regarding OOB component parameters: No, there is no complete documentation that I'm aware of, some of these options are scattered around in the Lithosphere, in some obscure PDFs, some internal documentation I got to peek into once or twice (don't have it myself though), some of them are also documented in these "Tooltip"-things that show up when you hover over a default Component in studio (on the quilts section where you can drag and drop components into a quilt) and then click into the tooltip, but this is not always the case and not everything you can do is documented there either (not sure how different that documentation is from the one in the PDF that Jake_N mentioned. Maybe SuzieH has a better answer here, she's the queen of the docs =)!
