Hi you could achieve this by first going into developer mode

1. Settings > Developer Mode 

2. Then Settings > Technical > Fields

3. Create your desired Field with its properties

4. This step is a bit tricky as you need to understand the basics of 'views' and 'inherited view'. Navigate your way to the product form and you can see a lady bug button at the side of the message icon on top right of your screen. Click on it.

5. Choose Edit View: Form 

6. There will be an inherited views tab and you will see several inherited views. 

7. click on the Add a line.

8. to help you write the necessary code, i will provide the basic structure of the code. Assuming you want to add the 'fields' next to barcode field.

and then click save and reload the page

Hope this helps

Mohamad Huzaifah

Computs Sdn Bhd