One moderator closed How can I upload a file to a specific folder when adding files to an existing archive in the Wayback Machine via the web interface? with the reason:
If the feature is not included in the end-user docs (product brochure, help articles, etc.), it not exists. It is your responsibility to thoroughly review them. On the other hand, questions asking for hidden features are off-topic. Also, veiled reverse engineering requests, veiled requests to develop workarounds, and veiled requests for tailor-made solutions are not allowed as questions should be clear. Such kinds of questions (reverse engineering, workarounds, solution development might require lengthy discussion in meta before being allowed. – Rubén♦ yesterday
I had never read that questions asking for hidden features were off-topic. I assume that hidden features refer to features that are not mentioned in the official documentation.
Should questions asking about the existence of a undocumented feature on a website be systemically closed or left open?
undocumented = not mentioned in the official documentation