1. Manage Templates
Go to "Manage Apps" and click on Custom Template.
Once there you can Create/Edit/Delete any Template in function of the Tab selected.
You can get some examples here
2. Create Template
In the desired Tab selected, click on Create Template.
Add the title to identify the Template.
Add the Template on the content section.
Use description format and comment format to set custom styles!
3. Visualize your Templates
Here are how you can see the Templates:
Description
The sidebar on the right displays a field "Description Templates", click and select the Template.
Send the template and then you are going to be able to see the content and edit if you want.
Submit and refresh the page!
Comments
In comment section it will be added a tab "Comment Templates", click and select the Template.
Send the template and then you can see and edit the Template if you want.
Submit and a comment will be added with that Template!