In rare cases, you may need to tweak JMeter configuration to specify custom settings to use to start and run JMeter. Settings such as the default language to start JMeter GUI with, which XML parser to use, what elements to display on the GUI menu, the look and feel, the SSL settings, defining remote hosts when doing distributed testing with a master/slave setup, logging threshold, and much more can be configured using JMeter properties.
In previous versions of JMeter, all properties were defined under the
$JMETER_HOME/bin/jmeter.properties file. This was monolithic and became a bit cumbersome to manage. Therefore, in later versions, the JMeter team has separated out these properties into additional files,