The second part of the reply about capturetime.month etc is excellent and just what I need, thanks. Suggest there are more examples added to that examples page so it is clearer that items such as capturetime can be modified with month etc.
However I don't understand the response about metadata pasting as there are no 'Apply' checkboxes (no checkboxes at all) so I must be using a different menu item and don't understand where to get to these boxes. what I am doing is putting in metadata on one image then going to the edit menu, doing a take metadata snapshot, then pasting that into a set of other images. From what you say this is the wrong thing to do. So what is the better way to do this?
I want to add metadata to images that already have some metadata without overwriting anything, in a few instances I may also want to append.