more intro updates

Author: vhorne

articles/web-application-firewall/afds/waf-front-door-drs.md

@@ -61,9 +61,10 @@ The version of the DRS that you use also determines which content types are supp
 
 ### DRS 2.1
 
-DRS 2.1 rules offer better protection than earlier versions of the DRS. It includes additional rules developed by the Microsoft Threat Intelligence team with updates to signatures to reduce false positives. It also supports transformations beyond just URL decoding.
+DRS 2.1 rules offer better protection than earlier versions of the DRS. It includes additional rules developed by the Microsoft Threat Intelligence team and updates to signatures to reduce false positives. It also supports transformations beyond just URL decoding.
+
+DRS 2.1 includes 17 rule groups, as shown in the following table. Each group contains multiple rules, and you can customize behavior for individual rules, rule groups, or entire rule set. For more information, see [Tuning Web Application Firewall (WAF) for Azure Front Door](waf-front-door-tuning.md).
 
-DRS 2.1 includes 17 rule groups, as shown in the following table. Each group contains multiple rules, and you can disable individual rules as well as entire rule groups.
 
 
 > [!NOTE]