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Custom Value Drawer Attribute

Instead of making a new attribute, and a new drawer, for a one-time thing, you can with this attribute, make a method that acts as a custom property drawer. These drawers will out of the box have support for undo/redo and multi-selection. 

public float From = 2, To = 7;

[CustomValueDrawer("MyCustomDrawerStatic")]
public float CustomDrawerStatic;

[CustomValueDrawer("MyCustomDrawerInstance")]
public float CustomDrawerInstance;

[CustomValueDrawer("MyCustomDrawerAppendRange")]
public float AppendRange;

[CustomValueDrawer("MyCustomDrawerArrayNoLabel")]
public float[] CustomDrawerArrayNoLabel = new float[] { 3f, 5f, 6f };

private static float MyCustomDrawerStatic(float value, GUIContent label)
{
    return EditorGUILayout.Slider(label, value, 0f, 10f);
}

private float MyCustomDrawerInstance(float value, GUIContent label)
{
    return EditorGUILayout.Slider(label, value, this.From, this.To);
}

private float MyCustomDrawerAppendRange(float value, GUIContent label, Func<GUIContent, bool> callNextDrawer)
{
    SirenixEditorGUI.BeginBox();
    callNextDrawer(label);
    var result = EditorGUILayout.Slider(value, this.From, this.To);
    SirenixEditorGUI.EndBox();
    return result;
}

private float MyCustomDrawerArrayNoLabel(float value)
{
    return EditorGUILayout.Slider(value, this.From, this.To);
}