Please override the '.panel-tool' CSS style.
<style>
.panel-title{
height:26px;
line-height: 26px;
}
.panel-tool{
height: 26px;
margin-top:-13px;
}
</style>
Another way to solve this issue is to download the newest 'panel' plugin from
http://www.jeasyui.com/easyui/plugins/jquery.panel.js. You will be able to custom your panel's header.
<div class="easyui-panel" style="width:700px;height:300px">
<header>
<div class="m-toolbar">
<div class="m-title">Panel Header</div>
</div>
</header>
<footer>
<div class="m-toolbar">
<div class="m-title">Panel Footer</div>
</div>
</footer>
</div>