# Pen

> The pointer type for pen events.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.IMGUIModule

```csharp
Pen = 2
```

### Remarks

Before you process an event as a pen event, you should check the [PointerType](/engine/6000.0/script-reference/unityengine/pointertype.md) of a mouse event (e.g. [EventType.MouseDown](/engine/6000.0/script-reference/unityengine/eventtype/mousedown.md)).

When a user uses a pen, some mouse events are often mixed with pen events in the event stream, and you can't distinguish them by type because mouse and pen events share the same [EventType](/engine/6000.0/script-reference/unityengine/eventtype.md). Instead, use [PointerType](/engine/6000.0/script-reference/unityengine/pointertype.md) to distinguish them. Otherwise, Unity processes all incoming mouse events as pen events, which can lead to unexpected behavior because the mouse events (pointerType = Mouse) do not have pen event fields, like [PenStatus](/engine/6000.0/script-reference/unityengine/penstatus.md), set.

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    void OnGUI()
    {
        Event m_Event = Event.current;

        if (m_Event.type == EventType.MouseDown)
        {
            if (m_Event.pointerType == PointerType.Pen)     //Check if it's a pen event.
                Debug.Log("Pen Down.");
            else 
                Debug.Log("Mouse Down.");                   //If it's not a pen event, it's a mouse event. 
        }
    }
}
```