I'm using the Boundless theme. I like it, but the image size on web browser is just too large. It takes up the whole screen. What code can I change to reduce the size (perhaps by half) and then center the image? I'm very new to code btw.
I found one post (copied below) that helped reduce the size, but it didn't center the image, and if there is more than one image, it only reduces the size of one.