# Multi-Select enum property on Unity Inspector

**EnumFlagsAttribute.cs**
```cs
using UnityEngine;
using System.Collections;

public class EnumFlagsAttribute : PropertyAttribute {
    public EnumFlagsAttribute() {}
}
```

**EnumFlagsAttributeDrawer.cs**
```cs
using System;
using System.Collections;
using UnityEngine;
using UnityEditor;

[CustomPropertyDrawer(typeof(EnumFlagsAttribute))]
public class EnumFlagsAttributeDrawer : PropertyDrawer {
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
        property.intValue = EditorGUI.MaskField(position, label, property.intValue, property.enumNames);
    }
}
```

**SampleEnumInspector.cs**
```cs
using System;
using UnityEngine;

public class SampleEnumInspector : Monobehaviour {
  [EnumFlagsAttribute] public SampleEnum sampleEnum;

  public enum SampleEnum {
    enumValue_1,
    enumValue_2,
    enumValue_3,
    enumValue_4
  }
}
```