The vector drawing program Corel Draw or Corel DRAW Graphics Suite uses the extension for its proprietary file format. These files contain vector graphics, illustrations, and text or bitmap images. Different versions of Corel Draw create different CDR files. Corel Draw in a lower version and other programs may have problems importing the file.
When saving a drawing, you can specify in CorelDraw exactly which version you want to save so that a receiver with a lower version of CorelDraw has as little difficulty reading it as possible. However, it should be noted that certain functions and elements may then not be saved.