To edit text, you must either select the text or place the insertion point in a word or paragraph where you want to begin editing.
Do any of the following:
Select a word: Double-tap it.
Select a paragraph: Triple-tap it.
Select a range of text: Double-tap a word, then move the selection handles to include more or less text.
Note: If you tap placeholder text, the entire block of text is selected.
Touch and hold within a line of text until a magnifying glass appears.
Note: You can’t place the insertion point in placeholder text. When you tap placeholder text, the entire block of text is selected and is replaced when you begin typing.
Drag your finger over the text until the insertion point is where you want it, then lift your finger.