copy paste from 4:3 to 16:9 = huge mess

Hello PhilippeDelv399,

Thanks for reaching out and for sharing this feedback about your experience with copy-and-pasting objects in Storyline 360. 

One workaround you can do is to use Storyline 360's Import slide feature to bring content into your project. Doing this allows the objects to retain their positions relative to each other even when transferred to a slide with a different size. Here's what content from a 4:3 slide looks like when transferred to a 16:9 slide. 

4:3

16:9

Hope this helps!