[She takes out her own journal and opens it to show him, indicating a few of the relevant buttons.]

The journal can be used to communicate with others. That is to say... Everyone in the village has one. If you write something in your journal, or speak into it, everyone will receive your message. And it will show a picture of you alongside the message as well, as long as the journal can 'see' you. [She doesn't really get how cameras work.]