When previewing in the mirror the app it does not allow changing width fit to hight fit.
If we are designing anything in landscape view it becomes hard to preview design.
Is there a way to make the preview hight fit?
Feel free to change your topic and move it to #product-ideas so people who find it relevant could vote for it. And add more details and examples regarding what exactly you want to achieve, as much context as possible is necessary.
I missed asking a question 
Is there a way to make the preview hight fit? if not i will tag #product-ideas
No, there is no way to do that, otherwise I would have suggested you to change the topic. 