utton button-hover" value="Layout" onClick="onClickLayoutButton()">
          <input id="spacingButton" type="button" style="color: #8A8A8A; background-color: #FFFFFF; color:rgba(0, 0, 0, 0.8); margin-left: 20px" class="button button-hover" value="Spacing" onClick="onClickSpacingButton()">
        </div>
        <hr class="separator-medium" color="#D7D7D7" size="1">

        <!-- The "Layout" tab for grid layout -->
        <div id="gridLayoutSection" style="display: block">  
          <table id="gridDiagr