Assalamualaikum and annyeonghaseyo. Tuto credit to
Ayuni. Adios.
1. Dashboard > Template
2. Click ctrl + F then find </html>
3. Copy paste this code under the code </html>
<!-- code for turning all non-blog links to new page links -->
<script type="text/javascript" language="javascript">
var arr = document.getElementsByTagName("a"); //get all links in the page
for(var i = 0; i < arr.length; i++)
{
if(arr[i].href.indexOf("Your URL") < 0 //not links that are 'inside' blog
&& arr[i].href.indexOf("javascript:") < 0) //not javascript links
arr[i].target = "_blank";
}
</script>
4. Preview & save.