Choosing the correct processor settings (input handling, spot color handling, ICC profiles) is critical to the proofing process.
To make this somewhat complex, error-prone task easier, the settings are organized into preset groups of default processing options and values that are suitable for most proofing tasks.
Note: If you choose a Process default setting and change one of the associated options, such as the simulation profile on the ICC Settings tab, the Processor Presets selection changes to Custom.