In order to create a child theme for the theme you need to create a new folder in the /themes/ directory of wordpress and place a new style.css file to register your child theme to your wordpress installation.

For example;

- Create a new folder like /rttheme17-child
- then create a new file as style.css


/*
Theme Name: RT-Theme 17 Child
Description: Child theme for RT-Theme 17
Author: Tolga Can
Template: rttheme17
*/


Double check the "Template: rttheme17" line of the code it must referring the same folder name of main theme.

Once you activated the new child theme from WP admin -> Appearence -> Themes, you can now start playing with the css files by copying selectors from the original theme css file (/css/style.css)

For example;

In order to change background color and default font size of the body text your new css file could be look like this



/*
Theme Name: RT-Theme 17 Child
Description: Child theme for RT-Theme 17
Author: Tolga Can
Template: rttheme17
*/


/* body */
body {
font-size:15px;
line-height:30px;
background:#FFBDAF;
}




Please remember, if you changed any color,size, font via Styling or Typography options, that selected value will be overwrite your child-theme css files as well.

-
Tolga