You can edit the size of your text to fit your needs. If you wish to change the size of the text in a text box:
Select the text box on the template.
Select the font size drop down box in the editor toolbar above the template.
Find the size you want by scrolling in the font size drop down box. The number can also be typed into the font size box, type the number and use the enter key on the keyboard.
Both the text and the text box will automatically resize.