Merge pull request SharePoint#4232 from andrewconnell/docfix-issue1924

Added missing RichTextMode prop to Field element table

Author: andrewconnell

docs/schema/field-element-field.md

@@ -209,10 +209,11 @@ The following sections describe attributes, child elements, and parent elements.
 |**ReadOnlyEnforced**|Optional **Boolean**. **TRUE** to specify that the user cannot change the field by any means and that it can only be changed by the system.|
 |**RelationshipDeleteBehavior**|Optional **Text**. Specifies a deletion constraint for a lookup field. For more information, see the **SPRelationshipDeleteBehavior** enumeration.<p>For a site column, the value must not be **Cascade** or **Restrict**. It can be **None** (the default), or the attribute can be omitted.</p><p>If you specify any value other than **None**, you must also specify **TRUE** for the **Indexed** attribute and **FALSE** for the **Mult** attribute.|
 |**RenderXMLUsingPattern**|Optional **Boolean**. Used for computed fields to determine the display format. If **TRUE**, values are rendered based on the display pattern of the computed field, rather than on the column value of the first noncomputed field reference upon which the computed field is based. For example, in a picture library, the Picture Size column is represented by **width** x **height**, but if this attribute is not set to **TRUE**, only the first field reference, **width**, is displayed. If it is set to **TRUE**, the format of **width** x **height** is displayed.|
-|**Required**|Required **Boolean**. If **TRUE**, the field must not have an empty value assigned to it. If a nonempty field value is not given in a form post, either the standard required-field text or an explicitly specified message (that is, via <ErrorText> tags) is displayed in the error form. This validation is handled only by the client (the database always allows **NULL** for all user-defined fields).|
+|**Required**|Required **Boolean**. If **TRUE**, the field must not have an empty value assigned to it. If a nonempty field value is not given in a form post, either the standard required-field text or an explicitly specified message (that is, via `<ErrorText>` tags) is displayed in the error form. This validation is handled only by the client (the database always allows **NULL** for all user-defined fields).|
 |**RestrictedMode**|Optional **Boolean**. **TRUE** to not allow the **Note** field to contain enhanced rich text formatting, such as pictures, tables, or hyperlinks, nor to allow pasting formatted text into the field.|
 |**ResultType**|Optional **Text**. Specifies the data type of values that are returned from the field.|
 |**RichText**|Optional **Boolean**. **TRUE** if the field displays rich text formatting.|
+|**RichTextMode**|Optional **Text**. One of the options from the [RichTextMode enum](https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.sprichtextmode.aspx?f=255&MSPPError=-2147217396).|
 |**RowOrdinal**|Optional **Integer**. Specifies the database ___location for the field.|
 |**Sealed**|Optional **Boolean**. Setting this attribute to **TRUE** for a field marks the field as irremovable. The **Change Column** page has no **Delete** button. Users cannot delete the field.|
 |**SeparateLine**|Optional **Boolean**. Used internally to support rendering a field (for example, Notes or Comments) in a separate line. This attribute is not intended for public use.|