The Splunk Interface - Implementing Splunk: Big Data Reporting and Development for Operational Intelligence - page 21

Using Manager
The Manager section, in a nutshell, is an interface for managing configuration files.
The number of files and options in these configuration files is truly daunting, so the
web interface concentrates on the most commonly used options across the different
configuration types.
Splunk is controlled exclusively by plain text configuration files. Feel free
to take a look at the configuration files that are being modified as you
make changes in the admin interface. You will find them in $SPLUNK_
HOME/etc/system/local/ and $SPLUNK_HOME/etc/apps/ .
You may notice configuration files with the same name in different
locations. We will cover, in detail, the different configuration files, their
purposes, and how these configurations merge together, in Chapter 10 ,
Configuring Splunk . Don't start modifying the configurations directly until
you understand what they do and how they merge.
Clicking on Manager , on the top bar, takes you to the Manager page.