By default, the Font toolbar contains tools to set the appearance of text within a selected markup.
If the toolbar is currently hidden, go to View > 
Toolbars and select it to show it.
Select Font: Sets the font of the selected text element.
Select Font Size: Sets the size (in points) of the font.
Text Color: Sets the color of the text. The rectangle below the icon denotes the current color.
Bold: Bolds the typeface.
Italics: Italicizes the typeface.
Underline: Underlines the typeface.
Left Alignment: Aligns the text to the left.
Center Alignment: Centers the text.
Right Alignment: Aligns the text to the right.