How to prevent text boxes from being separated after saving?

[Dalrae]

I am making an invoice, and to make it very easy to edit when I come back to it, I set up the text boxes on a column, with multiple new lines in between them, however when I save the PDF it splits the single text boxes into multiple text boxes, making it more difficult to edit them.

Before saving:

After Saving:

Is there some setting I can change to stop this from happening? I want the PDFs to be saved in the way that they were created.

[Thom Parker]

The correct way to do this is to add a text markup annotation, Not to edit the page content. 

There are ways to automate this process.  I've written tools that automatically adds numbers that have been circled and place a stamp or text box on the PDF next to the numbers. 

For example:

https://www.pdfscripting.com/public/Paper-Tape-Calculator-Description.cfm