I know a few people have been struggling to copy and paste things (from what Tarot Card are You? etc) and when I was explaining to one of our lovely members the other day we clicked what the problem was - I don't know if the others struggling are doing the same.
On these boxes you can't use the right click of the mouse. You copy it from wherever you are getting it with a right click but to copy it onto these boxes you need to use the buttons on the toolbar above (just the same as word) .
Scissors in top left corner to cut, two sheets of paper to copy, and the clipboard to paste.
I hope this helps,
Love Nova xxxxxxxxxxxxxx