Click the button "How’s your day?" on the first page, or the button with a ╋ symbol to create a new post. By default, all the new posts are private and only visible to yourself.
There're few functions on the post toolbar, including (1) Remove, (2) Create, (3) Save, (4) Share and (5) Next Post.
Click the book icon on the top, you can see all your posts, including:
1. your private ones
2. your public ones
3. the posts you share with penpals
4. the posts that your penpal share with you
These posts are marked with specific permission icons to help you identify who can read the post.