Key signatures are used to fit the instrument that will be playing that piece.
music scores are manuscript written music sheets. those who read them play instruments or sing. it is important to be able to read these so they can play what's on the page.
The ability to create realistic sketches is a person who is
considered to be a competent designer because they were able to represent
objects in real life with the use of their sketches in a way that this will
affect their designs to be more enhance as it is efficient and more effective
compared to sketches that does not depict more realistically. This will make
other people see a better picture and understand these sketches, having to
establish a more clear communication.