When we are giving a presentation, we often talk about changes. Usually we illustrate these changes with visual aids to show these changes. We need, however, to explain these changes. To do this, we need special verbs.
A Manual for Writers of Research Papers, Theses, and Dissertations, Ninth Edition: Chicago Style for Students and Researchers (Chicago Guides to Writing, Editing, and Publishing)
Complete English Grammar Rules: Examples, Exceptions, Exercises, and Everything You Need to Master Proper Grammar (The Farlex Grammar Book Book 1)