To adjust the right ascension (R.A.) of the telescope, you use the knob located at the front of the base.  This knob should turn smoothly and easily, providing a continuous motion of the scope about the R.A. axis.  The Questar is built so that the motor drive can be left on and adjustments made by hand at the same time without causing damage to the drive.  When you stop turning the knob, the motor will take over and continuously move the R.A. at the rate of the Earth's rotation.  To see the effect of the motor you can turn it off by using the line switch.  The object in the scope's field of view will soon drift out of view.  Don't forget to turn the motor back on again, and don't leave it off too long.

Notice the numbered ring on the base.  It is marked in both degrees and in hours of angle, hence the name "hour angle" (same as right ascension).  This ring is free to turn and can be set to the known R.A. of a star on which the scope is set.  If the motor is then left running for the rest of the night, you can locate any star in the sky if you know its R.A. (and its declination which will be discussed soon).  The process of "setting" this ring is part the set-up procedure which is done for you (along with the earlier mentioned polar alignment).  For this reason it is important that you not adjust the ring yourself unless instructed to do so.