How do I duplicate text or an image so it keeps the same style and font

Choose “Duplicate Selected Element” from the EDIT menu.

This will copy what you’ve selected, and paste it again onto the canvas with all of your formatting 

You can also use plane ol' Copy and Paste on any image.

Select an image on the canvas (it'll be highlighted in yellow) and copy it just as you would in any software.

Then Paste.  Instant duplication