Getting the 2 in H2O to sit below the line level you need Subscripts. Think submarine and for 20 degrease Celcius o to sit above the line level you need SuperScript. Think superman. YouTube Analir Pisani. http:azsolutions.com.au. Virtual and Face to Face Microsoft Office training for groups available in Sydney Australia. 

Analir Pisani - www.azsolutions.com.au
Microsoft Office Training Specialist