how to target=”_blank” in posts

i have searched for this topic on internet but i didn’t find anything. how to setup in wp to open links from posts in blank page, so when user have some links in post don’t need to type every time target=”_blank” on every link. but other links to open in self page. for example. you go to my blog and in homepage is some posts. so when you click on post it opens in target=”_self”, but when you read this specific post links in post to open in target=”_blank”