Product Viewer Template - Adding Annotation/Notes

The product viewer template is a great solution for a project I’m working on. I’d like to include the ability to add annotations when a piece of geo is highlighted. Perhaps to add on to the Spacebar menu.
I’m looking for this to be added dynamically, so if I add a new piece of GEO, UE4 will recognize and attach a new text area input, for potential feedback.

I have attached quick mock-up images for clarification.

Just looking for some direction. Any links to documentation or/and Youtube videos would be a great help.

Many thanks.