How to add featured image on the right side of post excerpt?

If I want to display the featured image on a post, but have them appear right aligned on a single post what settings do I need to change?

One more question. How can that same featured image, on the front page in the excerpt be a thumbnail and left aligned?

There is a special blog template called “Blog Image Medium” that you can use.
Here is an example with this Blog template in action: https://colorlib.com/travelify/blog/

If you want to align images on the right side and Excerpt on the left side you can add this to Theme Options – Other – Custom CSS.

.medium-wrap .post-featured-image {
	float: right;
}