Conductors help the musicians count and when to change volume. Also they help the musicians come in at the right time or to stop
<span>Registration: A method of correlating color separation so that the colors line up correctly. Press: A device used to transfer an image. Keyblock: A printing block that is used to create a black outline before the color is added, and usually has the most detail.</span>
In English pls this might fall in the Spanish section