Help changing featured image to vertical

How can I change the featured image to vertical? I would like this to be automatic on every one of my future posts. My website is

Also, if you give me a code or plugin, please tell me where and how to install or embed it. Thank you!

Hi @beckysquire,

I hope you are well today and thank you for your question.

You can try achieving this by using the solution posted in the following topic.

You can install WordPress plugin on your site as described on the following pages.

Best Regards,