I am trying to build a Landing Page. I'd like to send out an email with a link. Once the person clicks on the link I want them to come to a page with a request form. I don't want them to be able to navigate to any other pages on the site. Is this possible?
Should be no problem. Different themes may have different ways to accomplish this: Create a page, delete the Navigation block when in edit mode. Also, in properties you may wish to "exclude from navigation" so this page doesn't show on menu in the rest of the site.
Create a copy of your default page type from your them directory and name it landing_page.php. Upload this file to your theme directory, then inspect the theme through the dashboard. This will create a page type called "Landing Page". Alter this page to exclude any global areas and use this for all your landing pages.
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