Editing a Page
Drag "Title" onto page.
You should see this.
Click to edit.
To add text, drag "Paragraph" onto page.
Now you can add your text and edit it in the toolbar.
Drag "Picture" onto page.
An image before this will appear, "Sample Image." Click that and you will be directed to the same area that you used to design your header. (See "Design a Page")
*Side note: Other elements can be experimented with.