Episerver has preview functionality available in edit mode. It did not satisfy our customer. The customer wanted to see the page as it will be displayed when get published. But I found that Episerver has "hidden" feature which enables you to display concrete content version.

Episerver's HierarchicalCatalogPartialRouter already supports the versioned content display. You just have to take a string representation of the content link which has version info and append it to the URL by separating it with two commas. The URL will look like this:

http://localhost:53233/EPiServer/CMS/Content/en/,,315_1552/

But it seems the url does not work with visitor group

In preview/edit mode, we need "visitorgroupsByID" parameter in the Url to get the visitor group work (impersonate mechanism)
It looks like this: 

http://localhost:53233/EPiServer/CMS/Content/en/,,315_1552/?visitorgroupsByID=d5cb0441-90a5-4295-bc17-6548cb47b989

By default, if we don't set the visitorgroupsByID it will be treated as null => the same behavior with "Toggle view settings" is set to none.
In case we need a workaround to force visitor group check by default, we can follow these steps as below:
1. Create a class ForceVisitorGroupCheckAttribute (reference to the attach file)
2. Put the attribute created in step 1 above the controller:

[ForceVisitorGroupCheck]
 public class StartPageController : PageController<StartPage>
 {}