Dslide needs to dynamically show and hide content. I have been relying on overlays just for ease of accounting. Text properties are a valid fallback if I decide overlays are too fiddly.
I've run into a few cases where if I don't extend the overlay to underlap the beginning of an image, the overlay does not result in the image being hidden. Another case is a bit more egregious, but I couldn't put the example into dslide's demo.org file. I can probably diagnose this later with fresh eyes, but at this time, I am in need of freeing some biological memory and wanted to ask in case it's obvious what likely went wrong. The offending code hunks are the calls to `1-` here in https://github.com/positron-solutions/dslide/commit/ef9b7fe09551e0498a174a3ffa5b48b465cb1a07 Btw, this will be in the next dslide release that I am about to cut. Some cool features got added. Available in master and I appreciate running the demo.org to smoke out issues before I tag the release.
