You can add terms to both local and remote glossaries. You need read and write user permissions to add terms to a remote glossary that is not read-only.
To add a term to a glossary:
In the Terminology pane, select a word in the source segment and, optionally, the translation in the target segment, then click .
(Optional) On the Add Term dialog, enter content in the Description field.
Required fields are marked with a red asterisk.
Select the proper Glossary from the drop-down list.