On the edit view for the Alerts component, you can configure settings for filtering and data refinement.
For a new component, the edit view looks like:
To configure the component options:
If the box is not checked, then the search box is not displayed.
This box is checked by default.
If the box is not checked, then the EQL query is performed on the entire data set.
Note that the Save Preferences button does not affect the alert group configuration.