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James Loghry
That bar is enabled via enabling "Development Mode". Furthermore, it's displayed when you're viewing a page, not when you're viewing the code of that page. For more info see: https://help.salesforce.com/apex/HTViewHelpDoc?id=pages_dev_mode.htm&language=th (https://help.salesforce.com/apex/HTViewHelpDoc?id=pages_dev_mode.htm&language=th)