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# CTUnderlineStyle

Underline style specifiers.

```
struct CTUnderlineStyle
```

## Overview

You can apply these underline style specifiers to the value that you set with the [`kCTUnderlineStyleAttributeName`](/documentation/CoreText/kCTUnderlineStyleAttributeName) attribute. These specifiers control the underline style Core Text uses when rendering the text to which the attribute applies.

## Topics

### Constants

[`kCTUnderlineStyleNone`](/documentation/CoreText/CTUnderlineStyle/kCTUnderlineStyleNone)

A specifier that indicates not to draw an underline.

[`single`](/documentation/CoreText/CTUnderlineStyle/single)

A specifier that indicates to draw an underline consisting of a single line.

[`thick`](/documentation/CoreText/CTUnderlineStyle/thick)

A specifier that indicates to draw an underline consisting of a thick line.

[`double`](/documentation/CoreText/CTUnderlineStyle/double)

A specifier that indicates to draw an underline consisting of a double line.

### Initializers

[`init(rawValue:)`](/documentation/CoreText/CTUnderlineStyle/init(rawValue:))

Creates an underline style structure with the specified raw value.


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