Change Page Layout / Columns
In WebSpawner you have the capability of creating a layout with multiple columns, fitting all your content acorss or down a page.
As you drag modules onto a page (accessible by clicking "Modules" on the right-side menu), be mindful of the blue lines and the blue tags that read either "Column" or "Row" and wherever you have put them on the page, that is what they have created.
From there you can put modules underneath that one, stacking down the page if you'd like.
Remember, rows can also be established on the page. Content can occupy an entire row, or modules can be placed within that row.