How can you tell which fiber is on top of all the others in a thread slide?

On high power and by focusing the fine adjustment, you will be able to see the fibers one at a time. As you focus, different threads will come into focus at different times. The one that comes into focus the first should be the top thread, the one that comes the second should be the one under that, and so on and so forth.

AnswerOn high power and by focusing the fine adjustment, you will be able to see the fibers one at a time. As you focus, different threads will come into focus at different times. The one that comes into focus the first should be the top thread, the one that comes the second should be the one under that, and so on and so forth.