By default Piwik provides five custom variables. You may configure Piwik to track more custom variables. New custom variable slots will be created in both the ‘visit’ scope and ‘page’ scope.

First you need to be able to connect to the server running Piwik over SSH, so you can type commands to the Piwik console. To increase the custom variables slots from 5 to 10, type in the terminal:

$ cd /path/to/piwik
$ ./console customvariables:info

****************************************************
  Your Piwik is configured for 5 custom variables. 
****************************************************

$ ./console customvariables:set-max-custom-variables 10

You can now track up to 10 custom variables in the visit and page scope. Enjoy!