Select image by clicking on it
Write your message and name in the text fields
Choose the color for your message and name
Select font size
Move the text where you want it to be in the image by draging it
Click "Create Image" to produce the image with your text
The image will show below. Save it and share it.
Note: Sometimes the text might disappear when changing from wide to narrow images. This is because the text is out of image range. If this happens, choose a wide image and place the text in the center then choose a narrow one.