Thread:LovingKate/@comment-11871234-20150920203636/@comment-7395018-20150920210028

If you look in the visual editor, there should be something that looks like a puzzle piece.

If you click on that, there should be an option to modify it. Look through the list until you see the box with the title Modifications (or similar) and you should be able to add it in.

Or if you use the source editor, it might have a line where you can add in those modificatons.