Creating a Slide Master
As you continue working on your Slide Master, notice that the master text styles placeholder contains a model of up to five bullets in which the text gets smaller for each level.
In the Slide Master, the font sizes are preselected. The sizes are based on what a normal person is able to read from a reasonable distance. You can change the font size, but this is fine-tuning that you might want to do later.
Generally, you should keep the text the same color for the title and all text levels.