Like in various office documents you can easily insert line spacing simply by pressing a button. Now you can easily insert space between lines in your WordPress blog posts, pages and other content types by using Spacer, a free plugin that adds a spacer button in visual editor present in add new/ edit content pages.
Install and activate Spacer, after activation the plugin adds a new button in your content’s visual editor. Simply press the button after the line you want space to be inserted.
As soon you click the button it inserts a simple shortcode which default spacer height which is 20px, incase you like to increase the line between spaces then simply edit the shortcode’s 20px to something else you like.