† Although looking at the tag synonyms of tags here, I should probably have done it the other way around.
Instead of just creating the synonym as I expected, it showed me voting buttons (which obviously I couldn't vote on myself) as if I were not a moderator. I guess I should have noticed that the button said "Suggest" rather than "Create", but elsewhere on the site, diamond moderator 'suggestions' are rather more binding. *8')
It was then suggested that I needed to do this via the moderation tools, so I had a hunt around and managed to find the moderator tool for tag synonyms and approve my own synonym from there. I now see however that just clicking on the see all tag synonyms » link would have taken me there anyway.
It seems odd that we can't just create the tag synonym directly from the tag synonym page, and the suggestion mechanism breaks the expectation of moderator suggestions being immediately binding (like flags), so it would be nice if this behaviour could be made more consistent.
- Incidentally, I fully expect this to be status-declined, and rightly so since it only saves one click, but at least this post will serve as a searchable answer for future diamond moderators who are confused about this. *8')