HTML Codes
Highlight the text in the box (CTRL + A), copy (CTRL + C) and paste (CTRL + V) into the editor. CAPITALS indicate change. Eg. <b>This will be bold</b>
With the Colour, Size and Font change, you can combine them into one code. Eg. <font color='FF0000' size='+1' family='Calibri'>Red, big and in Calibri<font>