How do I add more image sizes to my theme?

Sometimes the image sizes that come with a theme don't quite work for everyones needs.  It is possible to get in and either edit the current sizes or add a new size but it involves getting into the code a teeny bit.

First, let's make sure you understand how the Featured images work to be certain you do need a new/different size.   See this article that explains exactly how this all works.

How to add a new size

Navigate to Appearance>Editor and click on the functions.php file from the right side menu.

Look for this next snippet of code

This code might look a little different on your end since the sizes might be different or they are labeled a bit different. But the code will generally look exactly like this.

You can see that it sort of duplicates itself with just slightly different names and sizes.  You will simply copy one of these lines and place another line at the bottom with your own name and image dimensions.

How to edit the size

Alternatively, you can edit the existing sizes of what you see there.  For example, the Horizontal Entry Image that you see in my example, I can change to 600px wide by 500px tall if I need it to be a bit taller for my specific graphics.