Doing this entails editing HTML code...never fear, it is easy. The following directions show the process within Blogger, but the essentials are the same across platforms.
) to tell the computer to open the link in a separate window. Find the word or phrase that you have linked to an outside website within the code. In this example it is "here." Look just prior to the hotlink and you will notice the ">" symbol. We will insert our new code just before the greater than symbol. Cut and paste the following code in to that space: target="blank". (Note: Do not put the period in the code)
The above image shows where to insert the code. As with the web links, be sure to test your links before posting. I have found that the Preview option of Blogger does not always allow me to test links so you may need to publish your blog post to effectively test it.
To read more about HTML code visit W3Schools.com, a great resource that outlines HTML codes and shows what each attribute and tag does.