This video explains the step by step procedure of doing the centering, levelling and focusing of a theodolite. This video contains the precautions you must take to avoid the mistakes happening during this entire process. Further it explains finer tips of doing it (Tips for fixing the instrument over tripod head, tips for adjusting height of the instrument, tips for levelling the bulls-eye bubble and longitudinal bubble) . Additionally this video elaborates the left thumb rule and the way of removing the parallax error during the focusing. Therefore I invite you watch and practice with me and face your practical assessments confidently.