When a Sitemate Link has been created, you'll still be able to go back and edit the link name & associated templates if required.
Hover over the link & select the pencil icon that appears (Edit button).
From here, you can edit the link name directly in the text field or un-select/re-select the templates you need (using the checkboxes on the left hand-side).
Click the Generate Link button when you're finished to save any changes.
Note: This won't change the URL link/QR code that has already been created (so no need to re-print any posters!). The next time the code is accessed, the updated details will appear).