IMAGE SIZES ON BLOGGER

How are the image sizes adjusted?  Hmmm.  I will try something and see what happens.  First select an image.

The image file did not change.  Is there a way to make it wider?  Yes there is.  Just click on the image and select X-large.  Whoo Hoo.

This is the Waco that flies out of Fullerton, California airport.  I need to take it for a ride and get some pictures.  Now I wonder if there is a way to edit previous posts to change the image sizes.  Hmmm.