How To Make A Separate Column Of Sidebar

In Edit HTML after you select Design, set in Sidebar Content.

.sidebar .widget, .main .widget {
  border-bottom:1px dotted $bordercolor;
  margin:0 0 1.5em;
  padding:0 0 1.5em;
 }

The code of each template can be different

To make it a separate of the sidebar, split between .sidebar .widget and .main .widget

example

.sidebar .widget{
  border-bottom:1px dotted $bordercolor;
  margin:0 0 1.5em;
  padding:0.5em;
}
.main .widget {
  border-bottom:1px dotted $bordercolor;
  margin:0 0 1.5em;
  padding:0 0 1.5em;
}