Currently there is no way to edit the text settings in the receipting option past the font/size/alignment/bolding options. What is missing is the paragraph options, which can help customize the spacing between lines. Where this would be important is beneath a signature, where it reads the signee's name, title, and organization. Because the titles are below the signature by adding a new line for each entry, it starts a new "paragraph" and defaults to double spacing where it should only be single spacing.
I have tried multiple workarounds unsuccessfully including trying to add enough spaces after the first entry to force the next entry into the next line, but that did not come out right after saving and previewing on the document. I have also tried to add a separate text box underneath the image box instead of using the text option with the image, with no success. Finally, I tried using 3 separate text boxes which made the spaces even bigger.
This seems like a trivial complaint, but it also seems like an easy fix. Plus, the more we can customize the more ideas people can get to develop the product!