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* Changes. to metadata in Manage users * changes to install section * Added titile * More changes. * Updated administration folder metadata, moved 2 files from installation folder. * Added links to Administration landing page, other metadata changes worked out. * Updated alerting section metadata. * Updated metadata of Auth section. Broke index and created separate Grafana Authentication section. * Added correct weight. * Updated metadata for the Best practices section. * Updated metadata in templates, broke Overview topic. * Updated subment Variable types metadata * Fixed yaml file and H1 description of Variables syntax topic. * Couple more metadata changes. * Added aliases files, as suggested by Diana.
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+++ title = "Enter variable Selection Options" type = "docs" [menu.docs] identifier = "variables-selection-options" parent = "variables" weight = 400 +++
Enter variable selection options
Selection Options are a feature you can use to manage variable option selections. All selection options are optional, and they are off by default.
Multi-value
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" >}}).
Include All option
Grafana adds an All option to the variable dropdown list. If a user selects this option, then all variable options are selected.
Custom all value
This option is only visible if the Include All option is selected.
Enter regex, globs, or lucene syntax in the Custom all value field to define the value of the All option.
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.
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.