Optimize gallery page for printing?

Site URL: https://www.stretchglasssociety.org/diamond-line-drawings

This page uses the gallery content block.   How can I use custom CSS to format the page for printing -- i.e., to eliminate the navigation, photo URLs, etc. and optimize arrangement of image titles and images?

Update:   I've been able to hide the superfluous "junk" thanks to another posting in the forum.   A remaining problem is that if I use the default portrait layout in print preview, the thumb image (image class img.thumb-image.loaded) seems to partly obscure the image title (class div.image-slide-title) in some cases -- the title seems to be wrapping instead of remaining entirely under the image depending on the width of the image.  The problem resolves if I switch to landscape layout, but this seems inelegant and I'd like users to have the option to use portrait.  Any insights would help - thanks!

Hi. Do you still need help on this?