How to export PNG & JPG or save Illustrator files with different dimensions, aspect ratios or sizes?

Hi there,

Thank you for reaching out. In addition to the suggestion share above, you may try the following workflows:

1.  Creating an Artboard of three dimensions and copy-paste the content. Then, resize and export it to PNG or JPEG.
2.  Create multiple Artboards with different dimensions within the document. You can change the Artboard dimensions using the following methods:
   
   1st Method:
   - Select the Artboard you want to resize on the Artboard panel.

    

   
   
   

   - Click on the artboard tool icon. 
   
   

   
   
   -  A window will pop up. That’s the Artboard Options window. Change the Width and Height values accordingly.
   
   

    

   2nd Method:
   When you click on the Artboard tool, you can change the artboard size from the Artboard panel under Properties.

   Step 1: Click on the Artboard tool in the toolbar.
   
   

   

    

   Step 2: Select the Artboard you want to resize. You will see the blue bounding box.
   
   

   

   
   Step 3: Change the artboard size W (width) and H (height) in the Artboard panel on the right-hand side of the Illustrator.
   
   

   

    

   I hope it helps!

Thanks & Regards,

Anshul Saini