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# XCUIElement.KeyModifierFlags

Flags for simulating combination keystrokes with keys, such as Control, Option, Shift, and Command.

```
struct KeyModifierFlags
```

## Overview

Use these flags with the [`typeKey(_:modifierFlags:)`](/documentation/XCUIAutomation/XCUIElement/typeKey(_:modifierFlags:)-6gaoi) and [`perform(withKeyModifiers:block:)`](/documentation/XCUIAutomation/XCUIElement/perform(withKeyModifiers:block:)) methods to simulate combination keystrokes while an action occurs.

## Topics

### Flags for combination keys

[`command`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/command)

The Command key in a combination keystroke.

[`control`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/control)

The Control key in a combination keystroke.

[`option`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/option)

The Option key in a combination keystroke.

[`shift`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/shift)

The Shift key in a combination keystroke.

[`capsLock`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/capsLock)

The Caps Lock key in a combination keystroke.

[`function`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/function)

The Function key in a combination keystroke.

### Initializers

[`init(rawValue:)`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/init(rawValue:))

Creates a flag that represents a key in a combination keystroke with the specified raw value.

### Legacy flags for combination keys

[`alphaShift`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/alphaShift)

The Caps Lock key in a combination keystroke.

[`alternate`](/documentation/XCUIAutomation/XCUIElement/KeyModifierFlags/alternate)

The Option key in a combination keystroke.


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