as of ElCaptian 3/9/16
default write DUDebugMenuEnabled 1 does not provide debug manual

 > defaults read com.apple.DiskUtility 
{
    DRBurnOptionsBurnSpeed = 65535;
    DRBurnOptionsCompletionAction = DRBurnCompletionActionEject;
    DRBurnOptionsVerifyBurn = 1;
    DRBurnSetupPanelDefaultDeviceIdentifier =     {
        Product = "DVD-R   UJ-868";
        SerialNumber = "MATSHITADVD-R   UJ-868  dE321DC4";
        Vendor = MATSHITA;
    };
    DRBurnSetupPanelExpanded = 1;
    DUDebugMenuEnabled = 1;
    DUDebugMessageLevel = 4;
    DUSavedDiskImageList =     (
        "/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/decryptedFile.dmg"
    );
    DUShowDetailsInFirstAid = 1;
    DUShowEveryPartition = 1;
    DUUseTimeEstimatesForDiscRecording = 1;
    NSNavBrowserPreferedColumnContentWidth = 186;
    NSNavLastRootDirectory = "/Volumes/HDIMAGES";
    NSNavPanelExpandedSizeForOpenMode = "{1187, 407}";
    NSNavPanelExpandedSizeForSaveMode = "{585, 587}";
    NSNavPanelExpandedStateForSaveMode = 1;
    "NSTableView Columns NSNavOutlineColumnSettings.v1" =     (
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0b646973 706c6179 4e616d65 86>,
        524,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 076d6f64 44617465 86>,
        284,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0c637265 6174696f 6e446174 6586>,
        95,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0e6c6173 744f7065 6e656444 61746586>,
        95,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 136b696e 64576974 686f7574 506c6174 666f726d 86>,
        62,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0c73686f 72745665 7273696f 6e86>,
        62,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 096c6162 656c4e61 6d6586>,
        62,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0c706879 73696361 6c53697a 6586>,
        60
    );
    "NSTableView Hidden Columns NSNavOutlineColumnSettings.v1" =     (
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0c637265 6174696f 6e446174 6586>,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0e6c6173 744f7065 6e656444 61746586>,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 136b696e 64576974 686f7574 506c6174 666f726d 86>,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0c73686f 72745665 7273696f 6e86>,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 096c6162 656c4e61 6d6586>,
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0c706879 73696361 6c53697a 6586>
    );
    "NSTableView Sort Ordering NSNavOutlineColumnSettings.v1" =     (
        <040b7374 7265616d 74797065 6481e803 84014084 8484084e 53537472 696e6701 8484084e 534f626a 65637400 8584012b 0b646973 706c6179 4e616d65 86>,
        1
    );
    "NSWindow Frame /Volumes/DATA/dgerman/Library/Logs/DiskUtility.log" = "157 104 652 674 0 0 1280 778 ";
    "NSWindow Frame DRBurnSetup" = "301 333 500 366 0 0 1280 778 ";
    "NSWindow Frame Disk Utility" = "140 134 932 638 0 0 1280 778 ";
    "NSWindow Frame Progress Panel" = "457 564 366 27 0 0 1280 778 ";
    "NSWindow Frame Progress Panel Frame" = "820 343 368 24 0 0 1280 778 ";
    "NSWindow Frame Single Function" = "423 175 518 484 0 0 1280 778 ";
    "NSWindow Frame mounts" = "470 263 810 515 0 0 1280 778 ";
    "advanced-image-options" = 0;
}