TextField half border - Adobe LiveCycle

[jeganadobe2020]

How to format the Textfield with half border on it. This is an account number field created with functionality to allow only 14 digits. I can format with full border but not with half height. Is there a way to do format as i expected? or Would appreciate any workarounds? (Adobe Livecycle Form Designer)

Expected Design Format

[radzmar]

It's not possible with just one text field but with two overlayed, you can create a similar thing.

<field name="Field_Background" y="41.275mm" x="25.4mm" w="49mm" h="10mm" access="protected">
            <ui>
               <textEdit hScrollPolicy="off">
                  <border hand="right">
                     <edge thickness=".176mm" presence="invisible" id="edgeBG1">
                        <color value="0,0,128"/>
                     </edge>
                     <edge use="#edgeBG1" presence="visible"/>
                     <edge use="#edgeBG1" presence="visible"/>
                     <edge use="#edgeBG1" presence="visible"/>
                     <fill/>
                     <corner presence="invisible" id="cornerBG1">
                        <color value="0,0,128"/>
                     </corner>
                     <corner use="#cornerBG1"/>
                     <corner use="#cornerBG1" presence="visible" thickness=".176mm" radius="5mm" id="cornerBG3"/>
                     <corner use="#cornerBG3"/>
                  </border>
                  <margin/>
                  <comb numberOfCells="8"/>
               </textEdit>
            </ui>
            <font typeface="Arial" weight="bold" kerningMode="pair" size="8pt"/>
            <margin topInset="0mm" bottomInset="0mm" leftInset="0mm" rightInset="0mm"/>
            <para vAlign="middle" spaceAbove="0pt" widows="2" orphans="2"/>
            <caption reserve="7mm" placement="top">
               <!--margin topInset="0.75mm"/-->
               <font size="8pt" typeface="Arial" kerningMode="pair"/>
               <value>
                  <text>Account Number</text>
               </value>
               <para marginLeft="0pt"/>
            </caption>
            <assist>
               <speak priority="toolTip"/>
            </assist>
            <border>
               <edge presence="hidden"/>
            </border>
         </field>
         <field name="Field_Foreground" y="41.275mm" x="25.4mm" w="49mm" h="10mm">
            <ui>
               <textEdit hScrollPolicy="off">
                  <border hand="right">
                     <edge presence="invisible"/>
                     <corner presence="invisible"/>
                  </border>
                  <margin/>
                  <comb numberOfCells="8"/>
               </textEdit>
            </ui>
            <font typeface="Arial" weight="bold" kerningMode="pair" size="8pt"/>
            <margin topInset="0mm" bottomInset="0mm" leftInset="0mm" rightInset="0mm"/>
            <para vAlign="middle" spaceAbove="0pt" widows="2" orphans="2"/>
            <caption reserve="3mm" placement="top">
               <font size="8pt" typeface="Arial" kerningMode="pair"/>
               <para marginLeft="0pt"/>
            </caption>
            <assist>
               <speak priority="toolTip"/>
            </assist>
            <border>
               <edge presence="hidden"/>
            </border>
         </field>

Paste this XML code into the XML source of your form right below a <subform>-element. It adds two fields, that will look this way.