2 Package Options

The behavior of the CVD simulation is configured through package options. These options apply to the entire document or until they are changed later using the commands described in Chapter 3.

2.1 CVD Type Options

2.1.1 Type Presets

The package provides convenient preset options for common color vision deficiencies:

Option	Description	Equivalent to
`protanopia`	Red-blind (complete red-green color blindness)	`type=protanopia, severity=1.0`
`deuteranopia`	Green-blind (complete red-green color blindness)	`type=deuteranopia, severity=1.0`
`tritanopia`	Blue-blind (complete blue-yellow color blindness)	`type=tritanopia, severity=1.0`
`protanomaly`	Red-weak (partial red-green color blindness)	`type=protanopia, severity=0.5`
`deuteranomaly`	Green-weak (partial red-green color blindness)	`type=deuteranopia, severity=0.5`
`tritanomaly`	Blue-weak (partial blue-yellow color blindness)	`type=tritanopia, severity=0.5`

2.1.2 Custom Type and Severity

For more control, you can specify the type and severity explicitly:

Option	Values	Default	Description
`type`	`protanopia`, `deuteranopia`, `tritanopia`	none	Sets the type of color-vision deficiency
`severity`	0.0 to 1.0	none	Severity level, where 1.0 means maximum severity (full colorblindness) and 0 means normal vision

2.2 Graphics Options

Option	Values	Default	Description
`graphics hook`	`true`, `false`	`true`	Enable or disable the simulation for included PDF images
`graphics convert`	`true`, `false`	`false`	Enable or disable ImageMagick conversion for raster images (PNG/JPG)

2.3 Complete Examples

% Most common use case: check for deuteranopia
\usepackage[deuteranopia]{cvd}

% Full customization
\usepackage[
  type=protanopia,
  severity=0.7,
  graphics hook=true,
  graphics convert=true
]{cvd}

2.4 Option Interaction

Preset options (protanopia, deuteranopia, etc.) override individual type and severity settings
If both a preset and individual options are specified, the preset takes precedence
Graphics options are independent of CVD type and severity settings
Options can be changed mid-document using the commands in Chapter 3