Title and Slider Images

Hey I have two questions that I tried to look through the forms for the answers but was unable to find what I was looking for and hope that I can get some help. First I want the Site Title and Tagline to be centered with each other. Right now they are both flushed left so the tag lines extends past the tile but when the screen is resized down to something smaller then it becomes centers. Second the slider images link to there on particular page which is great but I would like to add more information on the pages without it showing up on the main page in the text box that appears over the image.