How do I...Display content from another page?

You can include content from another page using:

{{ wiki.page("<page>", "<section>") }}

Where <page> is the page path and <section> is an optional section name.  Example:

Editor View

After Save

Note:  If you see a link to the page instead of the page contents itself, the page/section was not found.  Please verify that you are using the correct page path and section name.   

Refer here and here for more information on using Dekiscript functions.