public void Append_RefField(int no)
{
    var item = ModelCommonData.GetInstance.Reference.FirstOrDefault(x => x.No == no);
    if (item != null)
    {
        var field = new Field()
        {
            Width                        = FieldLength.Auto,
            Name                         = $"RefData{no}",
            Label                        = $"{item.Name} ({item.Unit})",
            DataType                     = typeof(double),
            AllowEdit                    = true, 
            Format                       = Datas.RefFormat,
            EditorStyle                  = m_view.TryFindResource("Stype_MaskedEditor") as Style,
            HorizontalContentAlignment   = System.Windows.HorizontalAlignment.Center,
            VerticalContentAlignment     = System.Windows.VerticalAlignment.Center,
        };


        var fieldSettings = new FieldSettings()
        {
            AutoSizeOptions = FieldAutoSizeOptions.All,
            AllowEdit       = true, 
            AllowSorting    = false,
            AllowSummaries  = false,
            AutoSizeScope   = FieldAutoSizeScope.Default,
        };

        field.Settings = fieldSettings;
        this.m_view.U_FieldLayout.Fields.Add(field);
    }
}

<Style x:Key="Stype_MaskedEditor" TargetType="{x:Type igEditors:XamMaskedEditor}">
    <Setter Property="Mask" Value="{}{double:4.2}" />
    <Setter Property="InvalidValueBehavior" Value="RevertValue" />
    <Setter Property="AcceptsArrowKeysInEditMode" Value="False" />
    <Setter Property="ValueConstraint">
        <Setter.Value>
            <igEditors:ValueConstraint MaxInclusive="9999.99"
                                       MinInclusive="0"
                                       Nullable="True" />
        </Setter.Value>
    </Setter>
    <Setter Property="ValueToDisplayTextConverter" Value="{StaticResource RefDisplay}" />
</Style>

I created a XamMaskedEditor using the EditorStyle property of the Field. The problem is that the field's width takes up too much space when editing. Is there a way to solve this issue?