A helpful feature you may have missed is the ability to renamed Shared Layouts.  Here’s how:

Step One:  Edit the Shared Layout you want to rename

Step 2: Go back into the layout selector

Now you will see “Rename” next to the Shared Layout you are editing instead of “Edit”.

Step 3: Click Rename

A pop-up will appear allowing you to enter a new name for your Shared Layout.

You will then see your Shared Layout is renamed.

Voila!