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* Add aliases to all files Signed-off-by: Jack Baldry <jack.baldry@grafana.com> * Prettify front matter Signed-off-by: Jack Baldry <jack.baldry@grafana.com>
28 lines
1.3 KiB
Markdown
28 lines
1.3 KiB
Markdown
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aliases = ["/docs/grafana/latest/variables/variable-selection-options/"]
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title = "Variable selection options"
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weight = 400
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# Configure variable selection options
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**Selection Options** are a feature you can use to manage variable option selections. All selection options are optional, and they are off by default.
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## Multi-value
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If you turn this on, then the variable dropdown list allows users to select multiple options at the same time. For more information, refer to [Formatting multi-value variables]({{< relref "formatting-multi-value-variables.md" >}}).
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## Include All option
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Grafana adds an `All` option to the variable dropdown list. If a user selects this option, then all variable options are selected.
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## Custom all value
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This option is only visible if the **Include All option** is selected.
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Enter regex, globs, or lucene syntax in the **Custom all value** field to define the value of the `All` option.
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By default the `All` value includes all options in combined expression. This can become very long and can have performance problems. Sometimes it can be better to specify a custom all value, like a wildcard regex.
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In order to have custom regex, globs, or lucene syntax in the **Custom all value** option, it is never escaped so you will have to think about what is a valid value for your data source.
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