To create new letter template that can be reused for future letters, follow these easy steps:
Step 1: Select 'New Letter Template'

On ribbon, click the "Communications" tab.
Under Templates group, select "New Letter Template".
Note:
To edit any existing letter template, double-click that template from grid under "All Letter Templates" command and then move to Step-2
Step 2: Fill the Form

The letter template form contains all of the information related to a letter template, broken down into few fields. Here you can enter template name, data source and attached document.
Note:
The fields marked with red star (*) at right end, indicate that these are required-fields while any other field can be left blank.
Step 3: Click 'Save & Close'
When you have finished to enter all the desired info, to save this data, choose any one option on ribbon:
Save and Close: saves everything you have entered so far and closes the form
Save and New: saves everything you have entered so far and reopens a blank form for another entry.