In order to change the author of an existing post in your blog, go to your WordPress admin area > Posts > Edit.
Click the post whose author you would like to change and find the Post Author section. From the drop-down menu choose the new author and then click the Update Post button to save the change.
If you want to see a video tutorial on how to change the author of a post in WordPress, click Play Video on the screen below.
Find more useful WordPress videos at WordPress.tv.
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