默认情况下，WordPress编辑器是不可以设置字号字体，字体，那么如何在WordPress后台编辑器增加字体格式大小按钮，我们可以在WordPress主题的functions.php 文件中添加以下代码即可：
function add_editor_buttons($buttons) {
2.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’fontselect\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
3.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’fontsizeselect\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
4.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’backcolor\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
5.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’underline\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
6.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’hr\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
7.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’sub\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
8.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’sup\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
9.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’cut\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
10.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’copy\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
11.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’paste\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
12.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’cleanup\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
13.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp_page\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
14.$buttons[] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’newdocument\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
15.return $buttons;
16.}
17.add_filter(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”mce_buttons_3\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”add_editor_buttons\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”);
你可以选择直接用编辑器编辑 functions.php 文件，也可以登录 wordpress 后台，单击“主题”——“编辑”，在打开的页面右侧“模版”中选择 functions.php(模版函数)，然后在其内部函数底部增加上面的代码，完成后点击“更新文件”即可！
代码说明：上面提供的代码，函数内部带有$buttons 的，每一句代码分别代表一种文章编辑功能，可根据需要进行增减；最后一句代码中的 mce_buttons_3 ，其 3 表示，该功能显示框出现在第 3 行，如果改为 2，表示在原编辑器的第 2 行功能按钮后增加该操作面板。