How to make Document & Line level notes mandatory?

@Harshita,

I don’t think it is possible via the no or low code customization. I think it should be possible through graph extension. Can you please share what is the screen and grid you are targeting? 

You will need to develop your graph extension logic on NoteFiles hidden field like:
 

protected virtual void CARecon_NoteFiles_FieldVerifying(PXCache cache, PXFieldVerifyingEventArgs e)
{
    //Write your Logic here
}