History has some configuration settings which you can customise to suit your needs. These are:

Name Type Description Default
save_auto Boolean If set to TRUE, will automatically save each page into the history. TRUE
save_ajax Boolean If set to TRUE, will save AJAX requests into the history. FALSE
default_page String The default page to start the history off with, or go back to if the back() method is called without a history (if blank, goes to your domain).
length Integer The maximum number of pages to be stored in the history. 10

To modify your settings, open the application/config/history.php file with a text editor and set your preferred configuration settings.