Hi Paride,
I am sorry for the late reply.
Regarding your inquiry, original and thumbnail size image at the general settings is the default size settings in EasyBlog 5. In EasyBlog 5, we have fixed the blog image sizes to reduce confusions from users that were using blog images on EasyBlog 3.9. On EasyBlog 5, it now only has the following fixed sizes:
- Original
- Large
- Medium
- Thumbnail
- Small
- Icon
The reason why is probably because we actually styled it using css so that the center of the image would be shown instead without having the image to run out of proportions and on top of that, have it be responsive as well. The idea / concept is pretty similar to the photos we used in EasySocial.
Our main priority / goal in EasyBlog 5 is to deliver quality contents to your end user while not sacrificing on the performance on your site (Having a super quality image loaded on the site costs are heavy since files are huge)
Hope this helps and have a nice day.