1 - Go to "My templates".
2- Click 'Edit' on the template in which you want to change the image.
3 - Find the slide you want to update the image on, and click on the pencil icon.
4 - Click browse to select the new image from your device. (On this screen, you're also able to update the way your current image is cropped.)
5 - After you've selected the new image from your device, select one of the cropping options and center the image to your preference. Click 'Crop' when you're happy with the centering.
6 - Click 'Save'.
