This option controls the names of the output disk image or archive and also the mounted disk image volume.

DropDMG asks you to enter the name of the image file it will create and the name of the volume that will appear on the desktop when you mount the image. DropDMG will automatically add the proper filename extension to the filename. It may also truncate the names you enter if they would be too long for the Mac’s volume and filename limits.
Note: The volume name is not settable when creating a device image, although you can use the CreateDeviceImages esoteric preference to tell DropDMG not to create device images.
Two additional options are available: