arch-config/config/walker/themes/default/item_symbols_grid.xml

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <requires lib="gtk" version="4.0"></requires>
  <object class="GtkBox" id="ItemBox">
    <style>
      <class name="item-box"></class>
    </style>
    <property name="orientation">vertical</property>
    <property name="spacing">10</property>
    <child>
      <object class="GtkLabel" id="ItemImage">
        <style>
          <class name="item-image"></class>
        </style>
      </object>
    </child>
    <child>
      <object class="GtkBox" id="ItemTextBox">
        <style>
          <class name="item-text-box"></class>
        </style>
        <property name="hexpand">true</property>
        <property name="hexpand-set">true</property>
        <child>
          <object class="GtkLabel" id="ItemText">
            <style>
              <class name="item-text"></class>
            </style>
            <property name="wrap">true</property>
            <property name="hexpand">true</property>
            <property name="xalign">0.5</property>
            <property name="justify">2</property>
          </object>
        </child>
      </object>
    </child>
  </object>
</interface>