Brief: this plugin allows 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 (Tinymce settings) as the picture below:
The below page appears:
-Enable TinyMCE Editor: to activate or deactivate the plugin.
-TinyMCE Theme: choose the editor theme.
-TinyMCE Theme Skin / Color: set the editor theme colour.
-TinyMCE Language: set the language used to display the editor.
The below editor shows up after adjusting the above setting.