@paulh88 The show description excerpt is displayed when you add show_desc="1"
to the master schedule shortcode. By default this is auto-generated using WordPress excerpt generation functions from the full show description. This intentionally strips HTML to give just a plain text display.
However, it is easy to overcome this. If there is an explicit post excerpt set on the Show page, that will be used instead. It supports HTML and that will display instead of the auto-generated excerpt. You will however need to keep it updated manually as it will no longer be tied to the main Show description.
There is also a radio_station_schedule_show_excerpt
filter in /includes/master-schedule-tabs.php
should you wish to have further control over the excerpt contents programmatically (this could be possibly be used to auto-generate an excerpt that includes HTML, but that would be a very tricky thing to achieve, because if you just truncate the content, you will break the HTML content.)
Note: Sometimes the Excerpt metabox on the Edit page gets hidden in WordPress, if that is the case you can toggle it’s display via the “Screen Options” dropdown in the very top right of the page.