# Interface: TextFontSizeOptions

Options for text font size operations with unit support.

## Properties[#](#properties)

| Property | Type | Description |
| --- | --- | --- |
| `unit?` | [`FontSizeUnit`](https://img.ly/docs/cesdk/sveltekit/api/engine/type-aliases/fontsizeunit/) | The unit of the font size. Defaults to ‘Point’ |
| `from?` | `number` | The start index of the UTF-16 range. Defaults to -1 (start of selection/text) |
| `to?` | `number` | The end index of the UTF-16 range. Defaults to -1 (end of selection/text) |

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[Source](https:/img.ly/docs/cesdk/sveltekit/api/engine/interfaces/spotcolor)