RadicalBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for RadicalBox objects.
RefreshRate is an option to Animate and related functions which specifies the refresh rate for frames in animations.
ReturnPacket[expr] is a MathLink packet that contains the expression expr, the result of an EvaluatePacket evaluation.
RussellRaoDissimilarity[u, v] gives the Russell\[Dash]Rao dissimilarity between Boolean vectors u and v.
SelectComponents[m, " prop", crit] computes a property " prop" for all components in a label matrix m and returns a version of m in which components that do not satisfy crit ...
ShowCellTags is an option for Cell that specifies whether to display tags for a cell.
SokalSneathDissimilarity[u, v] gives the Sokal\[Dash]Sneath dissimilarity between Boolean vectors u and v.
SpellingCorrection is an option for StringMatchQ, Names, and related functions that specifies whether strings should be considered to match even when a small fraction of the ...
SplineClosed is an option for B-spline functions and graphics primitives that specifies whether spline curves or surfaces should be closed.
StructuredSelection is an option for Cell that specifies whether to allow only complete subexpressions in the cell to be selected interactively using the front end.