Disc image created on a Macintosh computer using the built-in Disk Utility program; may contain multiple folders and files in a single disc image file that can be burned to a CD; similar to an .ISO file created on a Windows computer.
To create a ".cdr" file with Apple Disk Utility, first select the "Convert" option, then open an existing disc image file. Next, select "DVD/CD master" from the Image Format menu and click "Save".
NOTE: If a ".cdr" file will not open on a Windows computer, it may be possible to open the file by changing the file extension from ".cdr" to ".iso".
Drawing (or vector image) created with CorelDRAW; proprietary format used by Corel software and is not recognized by most image editing programs; if opened in CorelDRAW, the file can be exported in other more compatible formats.
CDR files can also be opened by Corel Paint Shop Pro, but for best compatibility, Corel recommends saving the CDR file as version 9.0 or earlier in CorelDRAW.
NOTE: Adobe Illustrator 9.0 or later may be able to open CDR files created with CorelDRAW 10 or earlier.