This request to make all hyperlinks pops up every now and then so might as well make a post for it. To make all links open in new window is amazingly simple. Just sign into DASHBOARD > DESIGN > EDIT HTML to open template editor
Use keyboard shortcut ctrl+F to find <head> and immediately after that, add a single line <base target='_blank' /> so that it become
<head>
<base target='_blank' />
Save the edited template and viola, all links in your blog will now open in new tabs or windows.
