Phoenix, try this.
In PR View, down at the bottom where the controller pane is, click on the little plus sign which more than likely currently reads 'velocity'
In the dialog box that opens up, select 'Wheel'.
This will now let you do an up or down pitch bend, but the RANGE of the bend must be set in the synth you'e using
Most synths default to something like 2 semitones, and some only let you set a small range, like 4 or 6, but other let you select anything up to 2 octaves.
You can then draw your bends in direclty in the controller pane, or you can practice using the mod wheel on your hardware synth, and when you've got it right, just record the pitch wheel movements.
Remember to reset it back to zero when moving from one phrase to the next or your next phrase will start at the wrong note.