Adding term to termbase (Trados Studio 2009)
1. Select the source term
2. Select the target term
3. Right click on any selected term and click on Add new term (or assign a shortcut for this via Tools – Options – Keyboard Shortcuts)
4. Click on the auto hide icon (only for the first time you add a term)
5. Click on the Save icon or F12 (for some reason F12 does not work for me and others as far as I know).
6. Move back to your text and continue translation (the add term pane will be hidden automatically).