When you first create a module you have the opportunity to arrange your dimensions by dragging them to the location you want them to be. You can drag them to either Pages, Columns or Rows.
Remember that the Time dimension is a default setting (always included). If you do not need the Time Dimension you need to click on it and drag it over to the left under list/rollup.
If you look at the image below you can see how the Pages, Columns and Rows will look in Grid View.
Another thing to remember, if you have two dimensions you are including in one area, for example, below you will both G3 Location and E1 Departments in Pages, your view will show those two in the order that you have them listed in the pivot view.
Best practices for the training course is to create your modules in the same view as the example model and the example screen shots under Check Your Work. That way you can easily compare your module structure.
Once you click OK when creating your module, the set up that you choose is your default view. To Anand's point, you can always change the default view by opening up pivot view, rearranging your dimensions and then saving this view as your default view under View>Save.