Thanks for the answers but what I'd really love to know is when do you use a lowercase letters to denote figures. When should I use, for example, figure 1.1 and 1.2 rather than 1.1a and 1.1b.

Hi

So I am currently writting my masters's thesis and my supervisor has told me my figures are labeled incorrectly. My question is this, if I want to put two figures in section 1.2 do I call them figure 1a and figure 1b or just figure 1.1 and 1.2?