The header selection under appearance has asking myself how this looks on an array of devices with their screen resolution differences. The interesting part about the header image is the size.
The circle, diamond, and star actual size is 3200 x 460, yet the upload section below the default images suggest the size 1600 x 230 for as-is. Anything bigger will be cropped.
On top of that, when a -child theme is applied a suggestion size is 960 x 250.
It seems the quality will go down as soon as a user of Twenty Thirteen makes a custom header... Is there a way to add an override cropping to a certain size? I want to create a custom header image as high as the defaults, 3200 x 460.
I could make a custom image at 3200 x 460 and replace one of the image names: star.png for example.
Maybe I am the only one, but it would be nice if there was an image with vertical lines showing how much the canvas will show on the landscape/portrait sides for major devices: iPad (retina), iPhone, Galaxy 3, the Nexus tablet, etc.