want to add letters written by my mother to my father.
Hi Kenyon, I have added letters to my ancestor by scanning the letter into my computer. Then going to FamilySearch.org, signing into FamilySearch and clicking on Memories. This action opens the Gallery with a green plus. Open up another window on your computer and find your letter. Grab and pull it over to the green plus. That action will then allow you to attach the letter to your ancestor. Good luck.
Yes, you can load and attach the letters. As indicated, you would need to scan the letters first. It is usually best to scan letters as a PDF file. Then you can load and attach the memories. Here is the link to the loading process.