Click 
Project Settings on the Home
tab. The Translation Memory and Automated
Translation page is automatically displayed in the Project
Settings dialog box.
Select the required translation memories:
If you already have default translation memories selected in the Options dialog box or translation memories selected in your Project Settings, they are automatically opened when you open a document for translation.
To open a translation memory in the Editor during translation:
Click
Project Settings on the Home
tab. The Translation Memory and Automated
Translation page is automatically displayed in the Project
Settings dialog box.
Select the required translation memories:
If you want to use a translation memory stored locally in a file, click Add and select File-based Translation Memory from the drop-down list.
If you want to use a translation memory stored on a server, click Add and select Server-based Translation Memory from the drop-down list. Select a translation memory from the Select Server-based Translation Memory dialog box.
If you want to use a translation memory with languages that differ from the ones in your project, use the AnyTM options, either for local or server based TMs. Find out more about Working with Language Variants.
If you want to use a WorldServer translation memory stored on a server, click Add and select SDL WorldServer Translation Memory from the drop-down list. Select a translation memory or translation memory group from the Select WorldServer Translation Provider dialog box.
The translation memories you have added appear on the Translation Memory and Automated Translation page and the Enabled and Lookup options are selected for the translation memory. When these options are selected, the translation memory is automatically searched during translation when a segment becomes the active segment.
Click OK to save your changes and to close the dialog box.
The translation memory is now opened in the Editor.