If you are seeing images in your email templates within campaigns display as "stretched" or not fitted to the screen in your email client on a mobile device, try configuring the applicable media element as seen below for the image:
Test by sending yourself an email notification from the campaign in draft state and view the image on your mobile device. The entire image should be fit to the device's screen.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)