I am trying to understand how to work with images in Ghost (and in and out of other editors). This is what I think, if I get it wrong please correct me.
If you upload an image, e.g. by dragging it into web browser editor, then ghost automatically uploads the original (or possibly resizes to 2000 px wide maximum ?).
Ghost creates responsive images of different sizes, but does this by serving a single image of a different size depending on browser (e.g. small for phone, big for laptop) , not by using with html
srcsetunless you do the
srcsetcode yourself (https://ghost.org/docs/api/v3/handlebars-themes/responsive-images/)
If you copy and paste an image out of the ghost web browser editor, you get whatever image the browser is currently displaying, likely smaller than your original image. So if you want to make a quick touch up of a photo, edit the copy that you uploaded originally, don’t copy and paste the image from the ghost editor.
Ghost does not do low quality image previews and lazy loading yet, but this is on the roadmap (it is done in this forum software, interestingly.) It is possible to achieve this in a ghost theme yourself if you take the time to do so.
If you export your Ghost website, you will get the original image you uploaded (or the max 2000px resizing).
If I got anything wrong, please feel free to correct me.