# CheckMate ## Session Settings

If you are using an Okapi Tool after the M9 release, you should be using the wiki online help:
http://www.opentag.com/okapi/wiki/index.php?title=CheckMate

This dialog box allows you to edit the main settings for CheckMate.

The list box enumerates all the documents currently in the session.

Add -- Click this button to add a new document to the list.

Remove -- Click this button to remove the selected document from the list.

Remove All -- Click this button to remove all documents from the list.

### Locales

Source locale -- Enter the code for the source locale, for example `en-us` for US English.

Target locale -- Enter the code for the target locale, for example `de` for German.

Note: All documents in the session must be for the same language pair. All documents must be bilingual/multilingual translated documents (for example: XLIFF, PO, TMX, TS, PO, etc).