To change the header background image, you have to edit the header.gif image in your template images folder. Then locate your header section on your css file and edit to the desired height:
1. I would like my logo image to be larger, but I can't seem to make the background image for the header any longer, so it looks funny when I make the logo larger. Is there a way to lengthen this ivory box with the fading blue border?
To edit your tagline text, edit your css file:
2. I want to make the text "MimKnits.com Online Store" in the header larger, but I've tried changing EVERY CSS and header php file I can find and I can't find where to change this. Am I missing something or is this not changable?
text-align : center;