you can do it with CSS
in this example the message is hidden through CSS with the style “display"none”.
this class will be visibile only in portrait view via MediaQuery ( the code below, in the symbol )
<style>
.portrait{ display: none !important; }
@media only screen
and (orientation : portrait) {
.portrait{ display: block !important; }
}
</style>
BTW: you must publish the example or use Hype Reflect.
portrait_alert.hype.zip (110.6 KB)