added static clarification to UDR

Author: TravisCragg-MSFT

articles/virtual-network/virtual-networks-udr-overview.md

@@ -73,7 +73,7 @@ You create custom routes by either creating [user-defined](#user-defined) routes
 
 ### User-defined
 
-You can create custom, or user-defined, routes in Azure to override Azure's default system routes, or to add additional routes to a subnet's route table. In Azure, you create a route table, then associate the route table to zero or more virtual network subnets. Each subnet can have zero or one route table associated to it. To learn about the maximum number of routes you can add to a route table and the maximum number of user-defined route tables you can create per Azure subscription, see [Azure limits](../azure-resource-manager/management/azure-subscription-service-limits.md?toc=%2fazure%2fvirtual-network%2ftoc.json#networking-limits). If you create a route table and associate it to a subnet, the routes within it are combined with, or override, the default routes Azure adds to a subnet by default.
+You can create custom, or user-defined(static), routes in Azure to override Azure's default system routes, or to add additional routes to a subnet's route table. In Azure, you create a route table, then associate the route table to zero or more virtual network subnets. Each subnet can have zero or one route table associated to it. To learn about the maximum number of routes you can add to a route table and the maximum number of user-defined route tables you can create per Azure subscription, see [Azure limits](../azure-resource-manager/management/azure-subscription-service-limits.md?toc=%2fazure%2fvirtual-network%2ftoc.json#networking-limits). If you create a route table and associate it to a subnet, the routes within it are combined with, or override, the default routes Azure adds to a subnet by default.
 
 You can specify the following next hop types when creating a user-defined route: