Tap on the camera option, this will open up the device camera.  
Capture an image, tap on the Use Photo option in the bottom right to proceed with your captured image.  Tap on the Retake option in the bottom left to re-capture the image.  You can crop, rotate and adjust the size of the selected image with our preset dimension templates using our custom crop toolbar. After the necessary adjustments have been made, tap on done to import the image to your canvas.