You can use the spacer widget to add space between your widgets.
Click on the Add Content tab (1) and you should be able to see the Spacer widget on the right (2).
Select the Spacer widget and drag it to your page (1)
Click on the widget so you can see the options.
1. Copy the widget so you can paste it into another page
2. Use this cross to move the widget across your page
3. Click on the Remove button to delete the widget from your page
Click on the Spacer widget and you will be able to change its Height (1). Save your changes when you finish (2).