Two Sidebar

Further to the Template with two Sidebar

4. Find the code as below (located in the <b:template-skin>)

body {
min-width: $(content.width);
}
.main-inner .column-left-outer {
width: $(main.column.left.width);
right: 100%;
margin-left: -$(main.column.left.width);
}
.main-inner .column-right-outer {
width: $(main.column.right.width);
margin-right: -$(main.column.right.width);
}

Change or replace be as below

body {
width: 1100px;
margin:0 auto;
min-width: $(content.width);
}
.main-inner .column-left-outer {
width: 20%;
right: 80%;
position: absolute;
margin-left: -$(main.column.left.width);
}
.main-inner .column-right-outer {
width: 20%;
float: right;
margin-right: -$(main.column.right.width);
}

Then add the following code, placed just below the code above

.main-inner .column-center-outer{
left:20%;
width:60%;
}

5. Copy the code css below, then paste it just above code ]]></b:skin>, Please select css code, in accordance with the type of template you are using.

For users Simple Templates and Travel Template, please copy css code below

/*Responsive*/
      @media screen and (max-width:1024px){
        body{width:100%!important;padding:0;}
      }
      @media screen and (max-width:768px){
        .main-inner .column-left-outer{position:relative!important;left:0;margin:auto;width:100%!important}
        .main-inner .column-center-outer{left:0!important;width:100%!important}
        .main-inner .column-right-outer{float:none;width:100%!important;}
        .footer-inner, .main-inner .column-left-inner, .main-inner .column-center-inner, .main-inner .column-right-inner{padding:0;}
        .Header h1{font-size:30px;text-align:center;}
        .Header .description{font-size:14px;text-align:center;}
      }
      @media screen and (max-width:414px){
        .footer-inner .section, .main-inner .column-left-inner .section, .main-inner .column-center-inner .section, .main-inner .column-right-inner .section {margin:10px;}
      }
      @media screen and (max-width:320px){
        .fauxcolumn-right-outer .fauxcolumn-inner{border-left:none;}
        .fauxcolumn-left-outer .fauxcolumn-inner{border-right:none;}
        .footer-inner .section, .main-inner .column-left-inner .section, .main-inner .column-center-inner .section, .main-inner .column-right-inner .section{margin:0;}
      }

For users Awesome Inc. template, please copy code css below

/*Responsive*/
      @media screen and (max-width:1024px){
        body{width:100%!important;padding:0;}
      }
      @media screen and (max-width:768px){
        .main-inner .column-left-outer{position:relative!important;left:0;margin:auto;width:100%!important}
        .main-inner .column-center-outer {left:0!important;width:100%!important;}
        .main-inner .column-right-outer {float:none;width:100%!important}
        .main-inner .column-left-inner, .main-inner .column-right-inner, .main-inner .column-center-inner{padding:0}
        .main-inner .section {margin:0 15px}
        .Header h1{font-size:30px;text-align:center;}
        .Header .description{font-size:14px;text-align:center;}
      }

For users Picture Window Template, please copy css code below

/*Responsive*/
      @media screen and (max-width:1024px){
        body{width:100%!important;padding:0;}
      }
      @media screen and (max-width:768px){
        .main-inner .column-left-outer{position:relative!important;left:0;margin:auto;width:100%!important}
        .main-inner .column-center-outer {left:0!important;width:100%!important;}
        .main-inner .column-right-outer {float:none;width:100%!important}
        .main-inner .column-left-inner, .main-inner .column-center-inner, .main-inner .column-right-inner {padding:0}
        .Header h1{font-size:30px;text-align:center;}
        .Header .description{font-size:14px;text-align:center;}
      }
      @media screen and (max-width:320px){
        .main-inner .section{margin:0 10px}
        .post-outer {padding:10px 10px;}
      }

For users template Watermark or Ethereal, same code as Picture Window template, but remove the code number 9 and replace it with the code below

.main-inner .column-center-inner{padding:0}
.main-inner column-left-inner, .main-inner .column-right-inner{padding:20px}

After the template is saved, then click the Back button, then turn off mobile display. View your blog.

Visit Mobile Friendly Test - Google to find out, What is a blog / web mobile friendly, without activating the mobile view?

Visit Responsive web checker to see the look of your blog on any screen size.

Note :
I only test on the first template, for each type of template. (except Dynamic Template).

Next
How to display post excerpt and thumbnail on the homepage of the blog.