Dashboards and panels allow you to show your data in visual form. Each panel needs at least one query to display a visualization.
**Before you begin:**
- Ensure that you have the proper permissions. For more information about permissions, refer to [About users and permissions]({{< relref "../../../administration/roles-and-permissions/" >}}).
- Identify the dashboard to which you want to add the panel.
- Understand the query language of the target data source.
- Ensure that data source for which you are writing a query has been added. For more information about adding a data source, refer to [Add a data source]({{< relref "../../../administration/data-source-management#add-a-data-source" >}}) if you need instructions.
For more information about individual visualizations, refer to [Visualizations options]({{< relref "../../../panels-visualizations/visualizations/" >}}).
1. Refer to the following documentation for ways you can adjust panel settings.
While not required, most visualizations need some adjustment before they properly display the information that you need.
- [Configure value mappings]({{< relref "../../../panels-visualizations/configure-value-mappings" >}})
You can configure Grafana to dynamically add panels or rows to a dashboard based on the value of a variable. Variables dynamically change your queries across all rows in a dashboard. For more information about repeating panels, refer to [Configure repeating panels]({{< relref "../../../panels-visualizations/configure-panel-options/#configure-repeating-panels" >}}).
To see an example of repeating rows, refer to [Dashboard with repeating rows](https://play.grafana.org/d/000000153/repeat-rows). The example shows that you can also repeat rows if you have variables set with `Multi-value` or `Include all values` selected.
**Before you begin:**
- Ensure that the query includes a multi-value variable.