for the second one, you can use the animation “Zoom” with a very long duration for this. The bars in some kind of right to left animation with a long duration as well, but they won’t be near as interactive as those in B&W website
Sparkle animates objects while scrolling based on the size of the height of the page (with percentages). Maybe the Sparkle team will consider animations based on pixels on a future release if it doesn’t complicate the simplistic approach of this amazing app.
Here is an example of a Sparkle page (only desktop layout is available for now); rubytravelsolutions.com/new. On this design, the header background is set to be hidden at 0% and visible at 1%.
Unfortunately we don’t. The documentation is built with Sparkle, and setting it for print is a manual process, which we haven’t done for Sparkle 3. We’ll look into it for Sparkle 4.