This requires a Supported NetMD Device.
Using the overflow menu, you can enable homebrew mode (formerly factory mode.) This mode is experimental and comes with no warranty.
Once you click, there is a warning popup. It is important to read and understand it.
You will see the recorder's firmware version (which is important for reporting issues to developers, and decides which homebrew features are available.)
The homebrew mode screen has three main sections for manipulating the disc ToC: (under construction)
In homebrew mode, the overflow (ellipsis) menu has different options. These are: