While Release Notes indicate that the debugger keeps being updated (for example: "added capability to use the gui debugger output window as a log viewer") the documentation does not seem to be updated to inform on how to use these new features and what are the new commands.
A striking example of poor documentation is that the Enhanced Debugger is not even mentioned in the documentation even though it has now been part of Bochs for years!
In the meantime some documentation for the debugger gui has been added and will be improved soon.