Step1Select the Tool menu at bottom. Then choose Text
Step2Tap on 'T' at top menu to insert the word/message.
Step3Align your text at this step.
Step4Tap the configuration sign (top-right) to set other properties, ex. Color, Font, Shadow and Opacity.
Step5Resize and move the text by dranging the bounding box. Any mistake, u can press the Undo button. Enjoy!