app/code/Magento/Backend/view/adminhtml/admin/login.phtml <label for="username" class="label"><span><?php echo __('User Name:') ?></span></label> <div class="control"><input type="text" id="username" name="login[username]" value="" class="required-entry input-text" placeholder="user name" /></div> label correct, input placeholder not correct (also password)