Move images and other media files which have to be loaded by URL to the cloud so the URLs don't have to be fiddled with as the site is copied around. Is it important that these external files come from SSL protected sites?

Here's one from wikimedia.org

The gallery shortcode is much more concise than raw HTML, but there's no control over thumb and slide captions beyond what's in the media library.
Moving sites around is more of a pain because the image ids are (usually) different in the different sites.

You can't seem to do this from the normal edit page, but have to go to the quick edit page. Irritating. OK I've found it now. Check 'Discussion' in screen options.

I set this flag so a register button now appears above the log-in button at the bottom of the left-hand menu. Let's see what happens

Something between a page and a series of posts. Initial experiments quite promising, but requiring a child theme for each theme used is not a good thing.

This post is showing its age. Presentations were abandoned long ago in favour of PowerPoint.