I hope this will also be indicated in the help documentation and / or in the UI.
Well most people do not read the docs or can't find the item, so a clear GUI text has my preference.
The docs are available from within jAlbum using F1 or the help icon. The wiki has a search function, so finding terms used is easy, though you may get more results than needed. To make it even easier there is a Glossary
Looking for help on the HTML editor, goto H click on item 8 HTML editor and you will see: HTML Editor