Editing text in a screenshot replaces words rendered inside a screen capture — a button label, a notification, a dialog, a nav item — without touching the underlying app. The system font (San Francisco on Apple platforms, Roboto on Android, the web app's own font stack), the status bar and every other element stay exactly as captured.
Sometimes a detail just shouldn't be shared, like an email address in a bug report. For that, redact it in your screenshot tool instead of replacing it; changing amounts, names or times on payment, chat or booking screenshots is not allowed under our Acceptable Use Policy.