# UpdateGuidelineDesignSettingsMainFontFamilyInput

> Input in domain **Guidelines**

- HTML: [UpdateGuidelineDesignSettingsMainFontFamilyInput.html](UpdateGuidelineDesignSettingsMainFontFamilyInput.html)
- Raw SDL: [UpdateGuidelineDesignSettingsMainFontFamilyInput.sdl](UpdateGuidelineDesignSettingsMainFontFamilyInput.sdl)
- Covered by: [llms.txt](../llms.txt)

## Input fields

- `guidelineId`: `ID!` _(beta)_ — `Guideline` Id.
- `mainFontFamily`: `GuidelineDesignSettingsTypeStyleFontFamilyInput!` _(beta)_ — Main Font Family