Alright guys, thanks. I noticed that the flight I did, I selected the top option which was TO as described above and that gave me a rotate speed of about 140 however the one underneath gave me a rotate speed of around 132 and the 3rd and final option underneath, that gave me a lower speed to rotate at. I selected the top option as I didn't want to get of the ground any sooner than 140 as I would have used even less of the runway! so selecting the TO 1st option on the thrust settings page was the best option. I just want to know if that's the right way of doing it, by selecting it from that page.