Select any Site

Go to Website, Site Designs and Select any of the Website to enter the Site Builder.

Select the Add Block

Clicking the Add Block will Show a Side Menu that have the different Items to Add. Drag and Drop the Spacer from the Elements.

Add the Spacer

Select the Spacer and Add it between Sections. Give it a different Color according to your preference. Click the Spacer and for more Settings Follow the Image below.

Increase/Decrease the Height/Width

In the Dimensions you can Increase and Decrease the Width and Height.