Improved README.

README.md

@@ -230,9 +230,13 @@ Custom DSL classes can be passed in using the `dsl_classes` argument of `calc()`
 
 **`is_verbose`**
 
-Setting `is_verbose` to a `True` value will cause progress of a calculation to
+Setting `is_verbose` will cause progress of a calculation to
 be printed to standard output.
 
+See also `calc_and_print()` which can format and print
+results. And `calc_print_plot()` which plots results using matplotlib.
+
+
 ### Settlement
 
 The `Settlement` element discounts the value of the included `Expression` from its given `Date` to the effective