---
title: "Preflight Rules Reference | Customer's Canvas Hub"
canonical: "https://customerscanvas.com/docs/hub/admin-guide/workflows/ui-framework/widgets/preflight/rules/"
---

# Preflight Rules Reference

> This page provides a summary of available preflight validation rules. For the complete reference, see the [onprem documentation](https://customerscanvas.com/docs/on-premises/preflight/reference/rules/).

## Available Rules

| Rule Type | Description |
|-----------|-------------|
| `colorspace` | Validates color space of images. Use `allowedColorSpaces` parameter to specify allowed values (e.g., `["CMYK"]`). |
| `spotcolors` | Validates spot colors. Use `allowedSpotColors` parameter to specify allowed spot color names. |
| `resolution` | Validates image resolution. Use `target` parameter to specify minimum DPI. |
| `safetyboxes` | Validates defined boxes (TrimBox, BleedBox, etc.). |
| `nomargins` | Validates that no important content is too close to trim edge. |
| `insideBleedbox` | Validates that all content is within the bleed box. |
| `sameorientation` | Validates that all pages have the same orientation. |
| `forbiddenfonts` | Validates that no forbidden fonts are used. Use `forbiddenFonts` parameter. |
| `allowedfonts` | Validates that only allowed fonts are used. Use `allowedFonts` parameter. |
| `fonttypes` | Validates font types. Use `allowedFontTypes` parameter. |
| `minfontsize` | Validates minimum font size. Use `minSize` parameter. |
| `textascurves` | Validates that text is converted to curves. |
| `embeddedfonts` | Validates that fonts are embedded in the PDF. |

## Common Parameters

| Parameter | Type | Description |
|-----------|------|-------------|
| `severity` | string | `"error"` or `"warning"` - determines if the issue must be fixed |
| `enableFix` | boolean | If `true`, displays a Fix button for autofix |
| `pages` | number[] \| string[] | Target pages (e.g., `[1,3]` or `["/2"]` for every 2nd page) |
| `params` | object | Rule-specific parameters |

## Example

```json
{
    "rules": [
        {
            "type": "colorspace",
            "severity": "error",
            "enableFix": true,
            "params": {
                "allowedColorSpaces": ["CMYK"]
            }
        },
        {
            "type": "resolution",
            "severity": "warning",
            "params": {
                "target": 300
            }
        }
    ]
}
```

For the complete rules reference with all parameters, see the [Preflight rules documentation](https://customerscanvas.com/docs/on-premises/preflight/reference/rules/).