A. To work around the small text editing area, try zooming in on the image before adding text. This will give you a larger view of the text area and make it easier to edit. After adding the text, you can zoom back out to see how it looks in context.
B. If the text area is still too small, consider using a different app for text editing. You can add text in that app and then import the edited image back into the AI Photo Editor.