Things to consider

Assuming you intend to embed the portal onto your site, give the portal container as much room as you can.

The more width you can allocate to the portal the better it will fill the screen, whilst the height will automatically adjust to the content.

If you have an existing panel setup, you will want to consider the following points (particularly if the portal is iframed on your site)

• Delete any messaging about cookie / login  problems (and remove any links to the standalone pages), as these are now gone.
• Remove references to the outgoing iframe html from your HTML code as this is dynamically created by the new code we've proved you.
• Make sure your panels login URL is up to date in Engage. 
• The new pages no longer have the requirement for separate login and registration URLs, so you don't need to allocate this on your site.