Docs: Add FAQcontent (#27139)

* update content

* updated content

* update content

* Update graphite.md

docs/sources/features/datasources/add-a-data-source.md

@@ -12,7 +12,7 @@ weight = 2
 
 Before you create your first dashboard, you need to add your data source. Following are the list of instructions to create one.
 
-> Only users with the Admin role can add data sources.
+> **Note:** Only users with the organization Admin role can add data sources.
 
 1. Move your cursor to the cog on the side menu which will show you the configuration menu. If the side menu is not visible click the Grafana icon in the upper left corner. Click on **Configuration** > **Data Sources** in the side menu and you'll be taken to the data sources page
    where you can add and edit data sources. You can also click the cog.

docs/sources/features/datasources/prometheus.md

@@ -12,11 +12,11 @@ weight = 1
 
 # Prometheus data source
 
-Grafana includes built-in support for Prometheus. This topic explains options, variables, querying, and other options specific to the Prometheus data source. Refer to [Add a data source]({{< relref "add-a-data-source.md" >}}) for instructions on how to add a data source to Grafana.
+Grafana includes built-in support for Prometheus. This topic explains options, variables, querying, and other options specific to the Prometheus data source. Refer to [Add a data source]({{< relref "add-a-data-source.md" >}}) for instructions on how to add a data source to Grafana. Only users with the organization admin role can add data sources.
 
 ## Prometheus settings
 
-To access Prometheus settings, click the **Configuration** (gear) icon, then click **Data Sources**, and then click **Prometheus**.
+To access Prometheus settings, hover your mouse over the **Configuration** (gear) icon, then click **Data Sources**, and then click the Prometheus data source.
 
 | Name                      | Description                                                                                                                           |
 | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |

docs/sources/panels/visualizations/graph-panel.md

@@ -51,7 +51,7 @@ Use these settings to change the appearance of the tooltip that appears when you
 - **Mode**
   - **All series -** The hover tooltip shows all series in the graph. Grafana highlights the series that you are hovering over in bold in the series list in the tooltip.
   - **Single -** The hover tooltip shows only a single series, the one that you are hovering over on the graph.
-- **Sort order -** Sorts the order of series in the hover tooltip if you have selected *All series* mode.
+- **Sort order -** Sorts the order of series in the hover tooltip if you have selected **All series** mode. When you hover your cursor on a graph, Grafana displays the values associated with the lines. Generally users are most interested in the highest or lowest values. Sorting these values can make it much easier to find the data of interest.
   - **None -** The order of the series in the tooltip is determined by the sort order in your query. For example, they could be alphabetically sorted by series name.
   - **Increasing -** The series in the hover tooltip are sorted by value and in increasing order, with the lowest value at the top of the list.
   - **Decreasing -** The series in the hover tooltip are sorted by value and in decreasing order, with the highest value at the top of the list.