You can change the page layout by using drag and drop operations.
You must have at least two visualizations on the same page to change the layout.
Click the title of a visualization and drag it over another visualization.
A shaded area will indicate where the visualization can be dropped.
All the visualizations will automatically adjust to fill the entire window.
Examples of using drag and drop
Placing a visualization beside another
Placing a visualization below another
Switching places between two visualizations