To view the driver settings you can use the Command Line Interface 'get' command.
This allows you to list the settings for each device and global "nodevice" specific settings using the commands:
device: upddutils [device n] get "*"
global: upddutils nodevice get "*"
These commands will list the settings explicitly set (during install or via the command line interface set command or using the UPDD API).
Settings not listed will be utilising the default values assigned to them.
In this Windows example the settings for two devices and the global settings are listed: