Pin is a fully responsive solution to make stacks sticky or fixed position.
Pin can hide fixed content on small screens or adjust its fixing position to account for responsive layouts.
On this page, only first info box is set to stick on mobile to preserve screen real estate. The notes on the right are also set to hide on mobile in the Pin stack settings.
Pin is ideal for having a second sticky navigation element on your page that will fix below your primary menu
Pinned elements can be set to hide with an animated effect - just like the SlideUp stack does.
See the Auto Hide page for examples.