XpoLog help - Global Filter Definition 

Global Filter
A global filter is a system wide filter applicable for multiple logs. When you add a global filter to XpoLog
it will be added automatically to the system's logs that match its definition.
 
Example
Go to top menu configuration - Global Filters and add a new global filter. Define a filter that will filter on a specific string. Once saved the filter will be added to all the logs in the system that has at least one string field. Another example is to add a priority filter as a global filter - when saved the filter will be added to all the logs defined in the system with the field priority.
 

Additional links

      Filter help
      Multi Filter help 
      Log View help