[Theme Horse Support Team]

Hi
You got to the attitude->library->structure->content-extension.php
From there you are selecting the blog image large or blog full content or blog post medium.
There is all the function. So you can edit in this page.
we have designed our theme this way. So you can customize the code as you want but we recommend you not to change the code because while updating to our new version all your customization code will be lost. So better make child theme and customize the code.
Thank you