Every machine comes with pre-installed manufacturer’s control settings specific to the body part you are scanning. Every ultrasound machine has many, many control settings and the number of possible combinations is mind-boggling. It used to be that operators would have to change these manually for each scan. Nowadays all that technical wisdom and experience have been distilled into selectable presets. These optimize the image for you automatically so you don’t have to. Use these. The quality of your images on the screen determines the quality of your interpretation from them. Give yourself every advantage and spend the extra 5 seconds selecting the right preset at the start.