When you look through the ocular lenses, what you see is your field of view. If you have to view several fields, it means when you're through viewing the current field, you move the slide to another area to view another field. When viewing multiple fields, it's best to use a back and forth pattern go all the way across the slide, move the over just the width of your field, then go back the direction you just came from, but in the next "row"