You can edit link templates though the Templates view.
To edit a link template:
Open the Templates view:
From the menubar, select Window > Show View > Other > Together Patterns > Templates.
Expand Local Templates and Java Link.
Right click on the template in this section and select Open. The link template editor opens.
The template editor for link templates gives a link tab option.
Enter syntax and comments on the link tab.
For more on acceptable template editor syntax, see Using Syntax and Conditions in Templates.