@junkfoodrehab.net: Ok I will try my best to answer your questions.
1. How do I decrease the spacing between the graphics currently featured in my widgets?
— Just change the margin bottom as per your wish and add the following CSS in “Appearance => Theme Options => Custom CSS” box
`.widget-feat-content { margin-bottom: 10px; }`
2. How do I decrease the space below the menu bar and the content on the page? I tried other css suggestions you gave others and they didn’t work for me.
— Just change the parting top as per your wish and add the following CSS in “Appearance => Theme Options => Custom CSS” box
`#main { padding-top: 50px; }`
3. How do I remove the faint gray border around all the images I’ve posted in the site?
— Just add the following CSS in “Appearance => Theme Options => Custom CSS” box
.featured-image img, .entry-content img, .comment-content img, .widget img, img.header-image, .author-avatar img, img.wp-post-image { box-shadow: none; }
4. How do I decrease the line break spacing between the images I posted on http://junkfoodrehab.net/shop/
— There is so many spaces in that page which is leading to extra tag `
` which is making is size increase. So, edit that page delete the extra space. To add new image don’t your Enter much.