How to do post feature open in new window full size ,I asked this question on WP official website but nevget get reply or Topic Deleted by Moderator
They deleted your question may be because its not v.clear. In title you are asking about feature image and in ost, you are asking how to open feature post in new window. well, When you select your image to add in post, you have to select size at that time - full size if you want so.