Is there a way to avoid the low-res preview that keeps confusing my link recipients?

The preview function is nice for some purposes, I suppose, but it's a nightmare for sending links to files that need to be seen in a high-res or a high zoom level. It keeps making people--extremely computer-literate people--who receive my links think that they're looking at the actual file when they're really looking at the preview of it. Much more often than not they want a higher-res view but do not download the file in order to get it. Either they don't see the download link to the right or they think that downloading the file will do nothing but give them a duplicate of the same awful resolution that they're currently seeing. (I'm pretty sure that DC isn't downsizing the actual files when I upload them because I tried an upload-download test of that, but if I'm wrong about that, please let me know.)

Is there a way to turn off the preview function? Or alternatively to set it to a higher resolution and/or set the default zoom on the document within the preview of it? (Yes, I know that you can set up a default view/zoom on a given file in its preferences--but, as I was also dismayed to learn awhile back--that does not seem to affect how it shows up in the DC preview.)

Thanks.