This is how I do it:
click on "Make titles or credits"
choose placement of the title
click on "Change the text font and color" a drop down of all your fonts will
be at the top
click on either color box on the left, that will bring up the color palette
for background and font color.
Under "size" there is a large A and a small A, you may or maynot be able to
enlarge text. If you have a lot of text it may not give you the option to
enlarge it.
You can then go to "Edit the title text" and type in you message.
Go to "Change the title animation" to make it appear in different ways.