Brief: this plugin enables you to edit the website contents very easily.
1- Login to the control panel
2- from the side list, select (settings)> then (plugins settings) as the picture below:
3- the settings list will show up, choose (Nicedit settings) as the picture below:
The below page appears:
-Enable NicEdit Editor: enable or disable the plugin
The below editor shows up after adjusting the above setting.