When you are writing your post in post editor then you can
add a link with another site or other page in your blog. At first highlight or
select the text you want to make a link, and then click on Link button
from the above toolbar.
A pop up window will appear.
Paste or write your web address. Click Ok.
If you want to the linked site will appear in a new page or
new tab then check “Open this link in a new window.” before click Ok.
Click here to show a demo if link.