@Divya,
I have configured in my local as per Kentico documentation and I am able to see the Layout manager (#Screenshot) icon in my CKEditor from Editable text web pat (You may missed the dependency plugins, verify).
Try this:
Download plugins and keep in Plugins folder i.e., \CMS\CMSAdminControls\CKEditor\plugins
- btbutton,widget,lineutils,widgetselection --> btbutton
- basewidget,layoutmanager ---> Layoutmanager (Rename from ckeditor-layoutmanager to layoutmanager)
1.Add below code snippet into \CMS\CMSAdminControls\CKEditor\config.js file.
config.extraPlugins = 'widget';
config.extraPlugins = 'lineutils';
config.extraPlugins = 'widgetselection';
config.extraPlugins = 'basewidget';
config.plugins += ",btbutton,layoutmanager";
config.layoutmanager_loadbootstrap = false;
config.layoutmanager_allowedContent;
config.layoutmanager_buttonboxWidth = 58;
2.I added the plugin to the Full toolbar.
config.toolbar_Full = [
[sourceName, '-'],
['Cut', 'Copy', 'Paste', 'PasteText', 'PasteFromWord', 'Scayt', '-'],
['Undo', 'Redo', 'Find', 'Replace', 'RemoveFormat', '-'],
['Bold', 'Italic', 'Underline', 'Strike', 'Subscript', 'Superscript', '-'],
['NumberedList', 'BulletedList', 'Outdent', 'Indent', 'Blockquote', 'CreateDiv', '-'],
['JustifyLeft', 'JustifyCenter', 'JustifyRight', 'JustifyBlock', '-'],
'/',
['InsertLink', 'Unlink', 'Anchor', '-'],
['InsertImageOrMedia', 'QuicklyInsertImage', 'Table', 'HorizontalRule', 'SpecialChar', '-'],
['InsertForms', 'InsertPolls', 'InsertRating', 'InsertYouTubeVideo', 'InsertWidget', '-'],
['Styles', 'Format', 'Font', 'FontSize'],
['TextColor', 'BGColor', '-'],
['InsertMacro', '-'],
['Maximize', 'ShowBlocks'], ['btbutton'], ['AddLayout']
];
You can also troubleshoot using F12 from CMSDesk if any js errors.
I hope this will helps you.