Location: Appearance → Customize → Front Page → General → Unique Post System
ColorMag Pro allows you to avoid the same post repeating over and over on the same page. (Available in ColorMag Pro)
Almost a dozen widgets are bundled in the theme ColorMag which are used to display various posts along with its featured image. These widgets display the latest posts or posts from some specific category. So, when many widgets are used on the same page, like the Front Page of the ColorMag Pro demo site, it is likely that the posts are repeated. That means the same posts can be displayed in several places by the different widgets.
In order to avoid this, under the Unique Post System, you can toggle the option to the right area to show posts only one time on a page.