sliding from the top

Sorry, that is not currently an option, though it’s possible you could customize it with CSS

Thanks, You know about example I can learn from?

Sorry I don’t have an example, but the basic idea would be to change the CSS transform on the .shiftnav element. If you inspect the markup and toggle the panel open and closed, you’ll see how it works. Basically you’d want to adjust the transformation to begin above the viewport rather than to the side of it, by using translateY instead of translateX ??