I found it by accident. Somehow the text on my iPhone was magnified so I could actually read it … but only on the small part of the screen that was visible. It turns out that by double touching the screen with three fingers, I could magnify my screen. Doing it again sent the text back to normal size.
Accessibility functions are designed to assist those with vision or hearing limitations. If you go to General Settings > Accessibility there are many options for you to choose from in the categories of Vision (zoom, voice over, grey scale, screen speak, large text, etc.); Interaction (custom gestures, call routing, keyboard settings, etc.); Hearing (hearing aids, LED flash alerts, mono-audio, etc.); Media (subtitles, captioning, audio descriptions); and a Learning section.