Copying items between Collections is essentially the same as DnDing^? (Drag and Drop) items between Collections. It adds "the same item" to the destination Collection.

Q. Can anyone think of any use cases for treating Copy and Paste between Collections as "Add Duplicates of the Copied items to the destination Collection?"

We also want to support Copying and Pasting items within the same Collection. However, if we extend the model we've established for Copying and Pasting between Collections, C&P within a Collection is essentially meaningless.

So, after chatting with Alec and Jeffrey briefly, we came up with the following proposal:

Create a new Edit menu item called Duplicate (Cmd/Ctrl - D) which creates a 2nd item that is essentially identical in every way with the original item except that the 2nd item has a different UUID (and different "date created", "created by" values as well).

And Copy and Paste is either:

1. Disabled when C&Ping within the same Collection; OR
2. If you Copy and Paste an event on the same calendar, it create a recurring event with custom recurrence dates (e.g. Esther's scenario). C&P within the same Collection would be disabled for non-event items.

If you don't want to create a custom recurrence, you can always use the Duplicate menu item (Cmd/Ctrl - D) first and then Cut and Paste the Duplicate.

The biggest downside of this approach is that Cmd/Ctrl - C is a lot more common than Cmd/Ctrl - D, so users might accidentally create a custom recurrence, when they really mean to Duplicate.

Q. What are use cases for using C&P to create a custom recurrence?

• I'm a traveling salesperson. For the next 3 weeks, I'm going to visit the same client and I take the same flight out on Monday morning and the same flight back on Friday evening.
• Esther's scenario: Scheduling an irregularly re-occurring board meeting 18 times a year.

Q. What are use cases for Duplicate?

• I am having a meeting with the same people in the same location about a different topic tomorrow. I want to Duplicate today's meeting item and re-title it for tomorrow's meeting.

Do other people have use cases? Which scenario is more common in calendaring?