You can view all of your journal entries for the course by clicking the Show All checkbox at the top right of a writing activity. While in this view, you can’t edit any journal entries, but you can read them all together.
Along with the Show All view, you can download a PDF export of all your journal entries for the course. To do so, click on the Download Journal link near the top right of the application. It will likely take several seconds to generate the PDF export. Once it’s done generating, your browser should give you the option to view or download the PDF file.