From the Maglr dashboard, click on the Publications tab at the top. Doing this will show all the publications, defaults and ones that have been created by you or other users connected to your account.
Click on the Preview of a publication or click on the edit button of a publication. This will then send you to the publication, with pages that make up that publication. From here you can view and edit the publication.
Mouse over a page of the publication that you would like to hide, you will see other icons appear on the right end of the page. To hide this specific page, click the Eye icon, specifically called Page Visibility. Clicking this icon will hide the page from view, you can hide multiple pages if you wish. If you are to hide pages and then publish the publication, that page will not appear for viewing after you click Publish for other users when viewing the domain URL. After performing this action, the specific pages you have deemed hidden will then become faded, indicating they are hidden.
You can still view and edit the page after making the page hidden, hiding the page does not affect the user from viewing or hiding the page.