You can configure the toolbar yourself by defining an object that tells ckeditor how to display and group items.
http://docs.ckeditor.com/#!/guide/dev_toolbar
From ckeditor docs:
config.toolbarGroups = [
{ name: 'clipboard', groups: [ 'clipboard', 'undo' ] },
{ name: 'editing', groups: [ 'find', 'selection', 'spellchecker' ] },
{ name: 'links' },
{ name: 'insert' },
{ name: 'forms' },
{ name: 'tools' },
{ name: 'document', groups: [ 'mode', 'document', 'doctools' ] },
{ name: 'others' },
'/',
{ name: 'basicstyles', groups: [ 'basicstyles', 'cleanup' ] },
{ name: 'paragraph', groups: [ 'list', 'indent', 'blocks', 'align', 'bidi' ] },
{ name: 'styles' },
{ name: 'colors' },
{ name: 'about' }
];
More info:
http://docs.ckeditor.com/#!/guide/dev_toolbarconcepts-section-toolbar-groups-configuration
Looks like there is a toolbar configurator tool on their site but it may only be for v4.5 and up. Not entirely sure:
http://ckeditor.com/tmp/4.5.0-beta/ckeditor/samples/toolbarconfigurator/index.html#basic