For majority of my relationship requirement documents (for Prospective Marriage Visa), I used Microsoft Powerpoint (since I personally found that it is way easier to use in terms of positioning photos and texts compared to Word).
I saved them in PDF format, and they are all waayyy over...
I am the sponsor while my fiance (applicant) is living in the Philippines. We have met in person but majority of our relationship was long distance.
We are so close to gathering all our documents and requirements, and we are planning to lodge our application in March 2019.