Use Pages’ new formatting tools
Sub/superscript
There are two ways to apply these to your document. If you haven’t typed the character or word, skip to step two; otherwise, you need to select the character or word using Pages’ selection tools. Tap the brush icon.
Apply formatting
Tap the three dots (…) in the row below the font name to see text options. Next, tap the superscript or subscript option under Baseline to format what’s selected or what you’re about to type in that style.
Text paper color
Select your text, tap the brush and then the three dots (…) as before. This time, scroll down to the bottom of the Text Styles pane and tap Text Background – swipe horizontally on the color picker for more options.