I will start by saying it is a great theme. Now, to the problem:
I notice that theme will hide part of the teaser image ( if it is in a grid layout) if its aspect ratio is not 3 by 2. Same with a header image of a post - depending on how wide a monitor is, the top and the bottom of the image can be cut. Or the opposite - if the monitor is super wide, the header can take half screen of the monitor.
Is there a setting in yaml that can prevent me from this by forcing an image to be full size? Or a way to set max width or height of an image and filling the empty spice with color? There surely must be a better way then cutting images to custom aspect ration.