On a transverse wave, what do we call the point where the medium is displaced the most upwards?

1. A transverse wave rises above and dips below the rest position as it travels. 2. The highest point, where the displacement of the medium is at a maximum, is a crest. 3. The lowest point, where the displacement is at a minimum, is the trough instead. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 8: Transverse waves_