I have built a page that is 1024 x 768. When I look at it on the web on a wide screen pc, there is a ton of room on the sides of the web page. How can I change that color on the side, say, to black? Mine is showing up as blue.

ps: Not to be confused with page background color.

Go to "settings", and then "background fill properties", then select "solid color" and you can make adjustments there. This is a brand new feature that was just added to version 6.06!