How to decrease empty space between Widgets?
Possible Answers to Your Question:
In each widget you will find an Advanced button on the Design Bar which has a Margin and Padding option showing four input fields. These correspond to the top, right, bottom and left sides. You can reduce the spacing first by adding a 20 to the top or bottom (or both) input fields of the Padding option. If that is too little, you change the number up or down by 5 until it sits where you like it. If it is not enough, also add a 0 to the Margin fields .
This tutorial goes over what you can do with the Advanced option in more detail: