Creating letters is as simple as giving in a name and adding.
You will have a list of letters with the most recent at the top of the list.
Create a once-off letter as above. Edit it by using the 'edit letter' function.
You may create a template for the letter first. You would use this to create letters for contacts are on a daily basis. An example is a welcome letter for new contacts.
Generate a bulk letter, for a group of contacts, using this same template.
Create the body of your letter. Select a group, or more than group to mail merge into your letter.
Once you have done this you can generate an acrobat pdf file for printing.
The system will add a page break after each contact.