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# 5.5 Esoteric Preferences

You can set esoteric DropDMG preferences by clicking the links on this page. Unlike with regular preferences, you must generally quit and re-launch DropDMG in order for an esoteric preference to take effect.

AppendDateWithSeconds
  When using the Append current date option, DropDMG usually uses the YYYY-MM-DD format. You can also set it to use the YYYY-MM-DD-HHMMSS format. This is useful if you will be creating more than one dated disk image on the same day and you want the files to have unique names.
BlankBackgroundSize
  When creating a disk image with a layout, DropDMG normally sets the size of the mounted image window to the size of the background picture. If you don’t specify a background picture, it uses 640×480. You can also set it to use 800×600.
CreateDeviceImages
  DropDMG normally detects when you are trying to make a disk image of a volume and creates a device image. Device images are exact copies, and creating them is faster. You may, however, prefer that DropDMG create regular disk images of volumes, as this will give you control over the volume name.
DisableRetinaBackgroundPictures
  Normally DropDMG creates background pictures for your layouts that are optimized for Macs with both Retina and non-Retina displays. Mac OS X 10.6 has a bug that prevents proper display of Retina background pictures (regardless of the Mac’s display type). Thus, for optimal deployment on 10.6 you can optionally set DropDMG to only create non-Retina background pictures.
HybridFSArgs

  When creating a `.iso` disk image, DropDMG normally includes a hybrid filesystem with HFS+, ISO 9660, Joliet, and UDF components. You can change which filesystems are included by entering this command in Terminal and removing the names of filesystems that you don’t want:

      defaults write com.c-command.DropDMG HybridFSArgs -array "-hfs" "-iso" "-joliet" "-udf"

LayoutViewGridSize
  DropDMG layouts ordinarily use a grid size of 16×16 points. You can temporarily ignore the grid by holding down the Command key or change the grid size to 8×8.
MJTUpdaterDeleteDiskImage
  Normally, the Software Update… feature will clean up after itself after downloading a new version. You can also set it to leave the disk image file in your `Downloads` folder.
ZlibLevel
  When creating disk images using the .dmg — smaller file, faster option, DropDMG normally uses the maximum level of compression to produce a smaller disk image. You can instead set DropDMG to faster compression. On some systems this will be almost twice as fast, but the `.dmg` files will be larger.

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