Step 1: Select the Text Tool from the tool bar.
Step 2: Click Add Text and your Text Properties box will pop up. This allows customization for different fonts, background colors, outline colors, text colors, blend modes, opacity, alignment, and many other options.
Step 4: To resize your text, click and drag the corners of your text box, or adjust the size using the sizing arrows in the Text Properties box.
Step 5: To move your text around your image, simply click and drag your text box to your designated location.
If you have any graphics on your image, it will also flatten on the image.
Step 7: If you wish to delete the text after you've flatten layers, click on 'History' and go back one step to undo the changes. You will have to type all your text all over again.