Playback and Recording : Record Setup : Setting the Session Meter and Tempo : Setting the Session Tempo

Setting the Session Tempo
When opening a new session in Pro Tools, the tempo defaults to 120 BPM. If you intend to record with a click at a tempo other than 120 BPM, make sure to set the tempo accordingly.
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Tempo events, which can occur anywhere within a Pro Tools session, appear in the Tempo ruler. For more information on inserting and editing tempo events, see Tempo.
To change the session tempo:
1 Double-click the Song Start Marker in the Edit window (see Song Start Marker).
2 Enter the BPM value for the session.
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You can type in a specific tempo, or you can use the T key to tap in the tempo.
3 Set the Location to 1|1|000 (to ensure that the inserted tempo event replaces the default).
 
4 From the Resolution pop-up menu, select the note value for the beat. (For example, if you are in 6/8, select a dotted-quarter note.)
5 Click OK.