SBL Admin Bar
Although the Admin Bar is very useful, it sometimes gets in the way when designing the site. By simply entering CONTROL-SHIFT-A while on the front-end (hold all three keys down simultaneously) you can easily turn the admin bar on or off. After entering CONTROL-SHIFT-A, a momentary dialog will appear indicating whether the admin bar is being turned on or off. Refresh the page and the admin bar will either disappear or re-appear depending on the state.
You can enable or disable this feature by WordPress user role in the plugin settings, which can be found in the WordPress admin menu under Settings -> SBL Admin Bar.
Thank you for using my plugin. I hope you enjoy it. You can submit bug or feature requests using the form on this page.
The Admin Bar source is available at https://github.com/lienhard/sbl-admin-bar
At WordPress.org https://wordpress.org/plugins/sbl-admin-bar/