Do you have already some code?
Ideed the idea of using a TRANSPARENT-STRIP can work.
$w('#myStripElement').onViewportLeave(()=>{ "WHAT TO DO HERE ???" })
“WHAT TO DO HERE ???” —> Hiding STRIP and showing Pinned-Element (for example a box)?
Not tested!
$w.onReady(()=>{
$w('#myStripElement').onViewportLeave(()=>{
$w('#myPinnedBoxElement').show('fade')
})
//vice-versa-function.....
$w('#myStripElement').onViewportEnter(()=>{
$w('#myPinnedBoxElement').hide('fade')
})
});