SalesScreen provides a powerful toolbox to customize the look of your dashboard. You can both rearrange and resize your widgets. These two functionalities goes hand in hand, so if you don't know how to resize widgets, have a look here.
The first step is to navigate to the Dashboard located in the left side menu.
Click on the Arrange button as shown below.
A right panel appears which contains the widgets of that board, represented as simple tiles. Drag and drop these tiles and you will see how the board transforms.
When you are happy with the arrangement, click on the Save button below the tiles in the right panel.