OptionInspectorSettings -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies the display of options in the Option Inspector.
Overlaps is an option to StringCases, StringCount, and StringPosition that specifies how to treat overlapping substrings.
PassEventsUp is an option to EventHandler that specifies whether events handled by a particular event handler should be passed up to event handlers in outer expressions.
RenameDirectory["dir_1", "dir_2"] renames the directory dir_1 to dir_2.
ScheduledTaskObject[id, expr, spec, ...] is a task object specifying future evaluation of expr according to spec.
ScriptSizeMultipliers is an option for Style that specifies how much smaller to render each successive level of subscripts, etc.
SetSystemOptions["name" -> value] resets the value for the internal system option with the specified name.
StackComplete[expr] evaluates expr with intermediate expressions in evaluation chains included on the stack.
StringFormat["string"] attempts to determine what ImportString format could be used to import the string " string".
StringTrim["string"] trims whitespace from the beginning and end of " string".StringTrim["string", patt] trims substrings matching patt from the beginning and end.