I’ve search the forum of the posts about how to force landscape, but it seems no standard way or easy to do it. I just want to ask whether there is an easy way that or official way to implement it?
Welcome aboard!
What do you mean by “force landscape”? In what context? Is it a mobile dev, where you want a landscape display even if you are in portrait mode? If so, maybe javascript - Force “landscape” orientation mode - Stack Overflow can help.