I have a responsive theme, however I also would like my images to be served depending on the device resolution. If anything I would at least be able to set this up for the product page image uploads.
1) How and where would I make these edits in the theme?
2) Whenever I upload 1x and 2x images to my files they get appended with different numbers under the FILES section, so I wouldn't even know how to save and upload the files for retina support. Any help is much appreciated.