Worked on templating docs, Closes #2274

docs/sources/reference/templating.md

@@ -5,14 +5,43 @@ page_keywords: grafana, templating, variables, guide,  documentation
 ---
 
 # Templated Dashboards
+![](/img/v2/templating_var_list.png)
 
-Templating feature can be enabled under dashboard settings, in the Features tab. The templating feature allows
-you to create variables that can be used in your metric queries, series names and panel titles. Use this feature to
-create generic dashboards that can quickly be changed to show graphs for different servers or metrics.
+## Overview
+Templating allows you to create dashboard variables that can be used in your metric queries, series
+names and panel titles. Use this feature to create generic dashboards that can quickly be
+changed to show graphs for different servers or metrics.
+
+You find this feature in the dashboard cog dropdown menu.
+
+## Variable types
+There are three different types of template variables. They can all be used in the
+same way but they differ in how the list variables values is created.
+
+### Query
+This is the most common type of variable. It allows you to create a variable
+with values fetched directly from a data source via a metric exploration query.
+
+For example a query like `prod.servers.*` will fill the variable with all possible
+values that exists in the wildcard position (Graphite example).
+
+You can also create nested variables that use other variables in their definition. For example
+`apps.$app.servers.*` uses the variable `$app` in its query definition.
+
+> For examples of template queries appropriate for your data source checkout the documentation
+> page for your data source.
+
+### Interval
+This variable type is useful for time ranges like `1m`,`1h`, `1d`. There is also an auto
+option that will change depending on the current time range, you can specify how many times
+the current time range should be divided to calculate the current `auto` range.
+
+![](/img/v2/templated_variable_parameter.png)
+
+### Custom
+This variable type allow you to manually specify all the different values as a comma seperated
+string.
 
 ## Screencast - Templated Graphite Queries
 <iframe width="561" height="315" src="//www.youtube.com/embed/FhNUrueWwOk?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
 
-<br>
-## Screencast - Templated InfluxDB Queries
-Coming soon