efficient way to do multiple version?

[Frenchie]

Bonjour Community!

So basically I am new with this software. I know how to use it but I would like to know something important regarding efficiency. 

I am supposed to design an app and of course it has to fit iphone 6,7,8 plus, X etc. as well as Android. 

Do I have to create a document/design for each version? or I can export or reuse a design I did for the 8 that would fit the X? 

What is the efficient way to do this? 

thank you so much,

Best,

J. 

[Sjaani]

I believe you would need to create a design for each size, these can all be on the same document.

I would suggest creating the design then copy and paste and resize into the other sizes, there might be some adjustment required to some components, but I think this would be the quickest way to create for multiple size devices.