In many aircraft (e.g. SE5a), the mixture is on a quadrant to your left or right, often next to the throttle lever. In some it's just a turning knob, which gives you no visual clue as to your setting. For many German machines (e.g. DVII) the mixture control is automatic, and so you should set mixture to automatic in the Workshop.
Last edited by Raine; 06/11/19 03:35 PM. Reason: Correction