CMSMS - Divider Widget (see more in the Widgets chapter) will visually separate your previous widgets from other site blocks with line, space or link.
Set titles and the widget’s width (in this case 1/4 for each, as we have 4 Widgets, and if one of them is just a divider - don't take it into account; if you had 1 widget, you could set 1/1 - and so on), then click “Save”. Here you can see how our widgets are organized:
You’ll get the same result like here after using these widgets:
You can set up Left/Right sidebars in a same way.
Make sure you’ve enabled one of them in Theme Page Options > Layouts.