Show Summary: The Snapshot summary is a high level summary of the key takeaways of your report, this summary is automatically calculated if you select show summary.
Display Legend: The display legend checkbox gives you the option to either, display at the top of the report the completion status legend, or not at all.
Sort By: You can also determine how your goals are sorted. Goals can be sorted by title, completion, start date or by deadline.
Export Size: If you'll be exporting the report to a PDF, you have an option to determine the font size of the report in the PDF download. Note- this won't change the size of the font on the report in Cascade, only in the PDF.