Can't add custom fields to 'new event form' to link events to a place

I have worked most things out on there, but I can’t work out how to bring up the option of linking an event to an existing place.

I have followed the instructions about adding “link posts:” custom field to the ‘add new post’ form, but the trouble is – it doesn’t appear!

I add this, and save, then go to ‘add new event’ and the option is not there. I have also found the same with trying to add “featured listing” in my business directory.

I must be doing something wrong, but I can’t work it out, and the V2 documentation is not helping me on this occasion.

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