You can change the font, size, and style of text in your visual by highlighting the text then selecting from the options in the Home tab.
Selecting any of the following options will immediately apply the change.
Font
Size
Tip: If the font sizes displayed don't match your needs, you can also type in a value between 4 and 400 for text size.
Style
Text style options include Bold, Italicize, Underline, Subscript, Superscript.