I know how to increase the pixel lenght of the page on a site designer theme, but I cannot find out how to eliminate the separations between the pages that build up automatically when I do that.
I want only one long page without separations for a sales letter.
Please help.
Thank you.

Is this for a sales letter that is to be printed, and not be put on the web? Maybe you need a different kind of software, like MS Publisher or so?