Virtual column as a Note - text field

[ElenaS]

Dear people , 
I build an app to make orders by using a template. And some options are missing for my business need. 
Please can you help me with the followings: 

I need to add a Note place order where I can put some notes regarding the order. Additionally if possible attach the Photo. This info has to be appearing in the order file (PDF) that send when the order status is complete. ()

I can not understand how I can do it with the virtual column, or maybe another way....

I will endlessly appreciate your help!

Elena

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