I've created a new app that will be accessed via a canvas page on facebook. I've entered the required domain and url, but I'm not seeing anyplace on facebook where I can actually see the canvas page. I'm in sandbox mode, does that make a difference? I'm just not seeing any option to see my canvas page. When I go to "preview" under "Review Status" I see some kind of stand in page but not my canvas page. What do I do?
Apps on Facebook are loaded into the Canvas section of the Canvas Page. The Canvas is quite literally a blank canvas within Facebook on which to run your app. You populate the Canvas by providing a Canvas URL that contains the HTML, JavaScript and CSS that make up your app. When a person using your app requests the Canvas Page, we load the Canvas URL within an iframe on that page. This results in your app being displayed within the standard Facebook chrome.
Here's how it works:
User goes to your canvas page (apps.facebook.com/canvasname) and they will see the normal Facebook application interface with a sidebar on the right and the other usual elements. The application will be loaded in an iframe. This iframe is loaded from the location you specify as Canvas URL. Canvas URL can be a page in your own website.
See Facebook Developers documentation for a detailed explanation.
I hope it helps!