Screen real estate can often be at a premium when designing dashboards of any sort. One easy way to help with this issue is to make use of the full-width of the page. By default, when you are creating a layout the container is set to a fixed width. There is a way to set this to a fluid, or full-width, container.
From the Page Designer for the page you are trying to modify, find and click on the Container link in the breadcrumbs near the top of the page. Once you click on that, a pencil icon will appear on the far-right. When you find the pencil icon, click it and container options will pop up.
On the pop-up options, find the Width field. Change the value of this field to Fluid and save the record. Your container will now be full-width.