| Function | V3 | V4 | Pro |
| Can embed colour space in jpeg or tiff | - | Yes | Yes |
| Can paste from the edit parameters function | - | Yes | Yes |
| Dodge tool available | - | - | Yes |
| Can display tone adjustments as curve in histogram | - | - | Yes |
| Has improved highlight control | - | Yes | Yes |
| Has banding elimination adjustment | - | - | Yes |
| Can save development settings as a Taste | - | - | Yes |
| Can save unsharp mask adjustments as a Taste | - | - | Yes |
| Can output templates of text and graphic overlays | - | - | Yes |
| Has batch processing, queue is processed while continuing edits | - | - | Yes |
| Has edit history | - | - | Yes |
| Tiff file LZW compression available | - | Yes | Yes |
| Printer colour management using vendor or custom ICC profiles. | - | Yes | Yes |
| Can use print templates for overlay of text and graphics | - | - | Yes |
| Can edit EXIF and ITPC information | - | - | Yes |
| RGB histogram displayed in tone curve dialogue | - | Yes | Yes |
| Has curves level correction function | - | Yes | Yes |
| Spot removal - auto erase | - | - | Yes |
| Spot removal - copy | - | - | Yes |
| Spot removal - brush sizes, density and feathering | - | - | Yes |
| Cropping for print area | - | Yes | Yes |
| Cropping for output size | - | Yes | Yes |
| Multi preview of different images | - | - | Yes |
| Synchronised multi preview mode, locks pan and zoom | - | - | Yes |
| Multi preview of same image at different edit levels | - | - | Yes |
| Referenced state multi preview mode, locks edits (?) | - | - | Yes |
| Display one click selection | - | Yes | Yes |
| Display smooth scrolling | - | Yes | Yes |
| Real time help | - | Yes | Yes |
| Floating thumbnail window with horizontal or vertical scrolling and placement options | - | Yes | Yes |
| Multi CPU support | Part | Yes | Yes |
| New registration process | - | Yes | Yes |
| Save and load customisation settings | - | - | Yes |
| Function | V3 | V4 | Pro |