Hello
Sorry, i did not explained this very well. Here is a better explanation ( i hope )
There is a auto-generated image option in the Joomla articles configuration panel.
" If enabled, jacontentype will generate one image into 3 size, Big, medium and small. the generated images will be stored in media/jatc "
those images can then be used in the latest news module for example. It avoids the dynamic bad resizing of images . It a nice feature that speed up loading time and is almost mandatory for any news site as search engine now want more loading speed .
This works perfectly in ja magz2 for example but it does not seem to work in ja focus, even with all the options enabled.