HandBrake

Can I get some more information about the "Encoder Preset" for x264? The documentation is rather vague. Is there a way to see the actual params from the GUI into the x264 engine?
Thanks.

Widely documented on the internet, including http://dev.beandog.org/x264_preset_reference.html

It's also displayed in the GUI (unparsed x264 options) and printed to the encode log.