Question for document link

I have question for the doc link.

FormA contains some fields for customer address info. When user click on a button , it will popup a window by using the @PickList to let the user select the customer from the pre-defined view, after the user selected the customer, the address info will fill out in formA automatically. This part is working perfectly well.

Now the user want to include a doc link for the selected customer and put the doc link into formA as well, so when the user click on the link, then will bring them back to the form that contain the customer info.

Any simplest / right way to do this?

what I tried is create a new column like @text(@documentId) in view which the @picklist using, then in the formA creat another new rich text field to accept the @text(@documentid), it does populate the @documentID from the view, but I want to show as a doc link icon, so it become clickable instead of long text for the @documentId.

Thanks!