How can I hide BrowserTweaks products in the browser toolbar?

And how can I make them reappear?

You can add or remove BrowserTweaks.com toolbar buttons using the Customize Toolbar dialog box. Go to the View > Toolbars menu and click Customize... In the Customize Toolbar dialog box you can add or remove any toolbar buttons. To add BrowserTweaks.com products to the browser toolbar, scroll through the Available toolbar buttons list, select a BrowserTweaks.com product and click Add. Close the Customize Toolbar dialog box and the BrowserTweaks.com product will appear on the toolbar. Repeat as needed. To remove BrowserTweaks.com products from the browser toolbar, scroll through the Current toolbar buttons list, select a BrowserTweaks.com product and click Remove. Close the Customize Toolbar dialog box and the BrowserTweaks.com product will disappear.