You can save the fan letter you wrote by using the "Save" button at the bottom of the viewer.
There is no "Save" button for other fans' fan letters.

You can share the fan letters written by other fans by following the steps below:

※ Mobile APP
- A community you joined -> Feed tab -> Fan Letter tab -> Fan Letter viewer -> Share button

※ PC WEB
- A community you joined -> Artist tab -> Fan Letter -> Fan Letter viewer for fan letters that were sent -> Share button