(DOCSP-30134) Adds more info on how to use word cloud size and color channels (#600)

* (DOCSP-30134) Adds more info on how to use word cloud size and color channels

* Includes changes from copy review

Author: sarahsimpers

source/chart-type-reference/word-cloud.txt

@@ -52,11 +52,41 @@ Word clouds provide the following :ref:`encoding channels
        the size of each :guilabel:`Text` value, with larger aggregated
        values resulting in larger text sizes.
 
+       .. example::
+
+          If you set the :guilabel:`Text` and :guilabel:`Size`
+          channels to the ``genres`` field from the 
+          ``Sample Data: Movies`` collection, 
+          |charts-short| creates a word cloud where the most frequently
+          occurring genres are largest.
+
+          If you set the :guilabel:`Text` channel to the ``genres``
+          field and the :guilabel:`Size` channel to the ``runtime``
+          field, |charts-short| creates a word cloud where the genres
+          with the longest aggregate runtimes are largest.
+          
+
    * - Color
      - Category
      - (*Optional*) Colors each text value to indicate a corresponding
        data value from the applied field.
 
+       .. example::
+
+          If you set the :guilabel:`Text`, :guilabel:`Size`, and :guilabel:`Color` channels to the ``genres`` field from the 
+          ``Sample Data: Movies`` collection, |charts-short| creates a
+          word cloud where the most frequently occurring genres are
+          largest and each genre is a different color.
+
+          If you set the :guilabel:`Text` and :guilabel:`Size` 
+          channels to the ``genres`` field and you set the
+          :guilabel:`Color` channel to the ``rated`` field, 
+          |charts-short| creates a word cloud where
+          the most frequently occurring genre and rating combinations
+          are largest. Each genre and rating combination is a different
+          color, so the green text value for dramas rated R displays
+          larger than the blue text value for dramas rated G.
+
 Use Cases
 ---------