Well, there is no such option.
I was able to create a layout to get the picture like your screen-shot, but it's huge.
I will consider this with other team members. Maybe, we will decide to create a Feature ticket, but I'm not sure, maybe, there is much easier solution than the following one.
Example
<%@ Page Language="C#" %>
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Ext.Net Example</title>
<style type="text/css">
.red-text {
color: red;
font-size: large;
}
.my-label {
padding-top: 3px !important;
padding-bottom: 3px;
}
</style>
</head>
<body>
<form runat="server">
<ext:ResourceManager runat="server" />
<ext:FormPanel runat="server" HideLabels="true" Width="250">
<Items>
<ext:CompositeField runat="server" AnchorHorizontal="-5">
<LayoutConfig Pack="End" />
<Items>
<ext:Container runat="server" Layout="FormLayout" HideLabels="true" Height="20">
<Items>
<ext:DisplayField runat="server" IndicatorText="*" IndicatorCls="red-text" Width="1" />
</Items>
</ext:Container>
<ext:BoxComponent runat="server" Width="5" />
<ext:DisplayField runat="server" Text="Label:" Cls="my-label" />
<ext:TextField runat="server" Width="150" />
</Items>
</ext:CompositeField>
<ext:CompositeField runat="server" AnchorHorizontal="-5">
<LayoutConfig Pack="End" />
<Items>
<ext:Container runat="server" Layout="FormLayout" HideLabels="true" Height="20">
<Items>
<ext:DisplayField runat="server" IndicatorText="*" IndicatorCls="red-text" Width="1" />
</Items>
</ext:Container>
<ext:BoxComponent runat="server" Width="5" />
<ext:DisplayField runat="server" Text="Label Label:" Cls="my-label" />
<ext:ComboBox runat="server" Width="150" />
</Items>
</ext:CompositeField>
<ext:CompositeField runat="server" AnchorHorizontal="-5">
<LayoutConfig Pack="End" />
<Items>
<ext:DisplayField runat="server" Text="Label:" Cls="my-label" />
<ext:TextField runat="server" Width="86" />
<ext:DisplayField runat="server" Text="sometihng" />
</Items>
</ext:CompositeField>
</Items>
</ext:FormPanel>
</form>
</body>
</html>