Missing features when replying in Outlook 2013

When I reply in Outlook 2013, I no longer seem to be able to insert pictures, create a table, change the message format, request a read receipt and a whole lot of other things which I was able to do in Outlook 2010.

Interestingly enough, these features are available when I create a new message or first open the message via a double click and then press the reply button.

How can I make all the features available when replying to a message as well?