Here’s my idea how this can be achieved. One can set up a “virtual browser” to open the doc on demand or on schedule and generate a PDF output from a section, which can then be emailed. This will require some coding though, but the result will be as close to how it looks in Coda as possible. Besides, will only work for docs that don’t require sign in to view (because implementing Coda/Google sign in routine in a virtual browser is a major pain)