Creating a new Newsletter is as easy as Duplicating a previous month's layout from an existing Newsletter in the system.
To duplicate an existing Newsletter, you can right-click on the Newsletter (or if you hover of the Newsletter click the More option in the bottom right corner of the preview) and choose Duplicate.
Now, depending on how you would like to publish the new Newsletter, you have two options to choose from.
If you'd like to use the Same Link to access the Newsletter, use the Duplicate as an Archive of the previous month's Newsletter and update and Share the existing Newsletter once you're finished. Once again, this option is best if you want to use the same link for each new Newsletter.
If you want to use a New Link for the new Newsletter, use the Duplicate as your new Newsletter and use the current as an Archive. This option is best if you want to create a unique link for each Newsletter, just in case you want to people to access any older Newsletters with their own link.