Format Text Ribbon has; Font, Paragraph, Style Sampling and Layout You use this ribbon after you have selected a text box on the insert ribbon.
Font - this is where you can choose your font, size, color, Bold, Italic and underline.
Paragraph - this is the alignment for top to bottom, right to left, margins and if you want to add bullets to your text box and indenting paragraphs.
Style Sampling - Use this feature to sample a text box and then paste the same formats to a new text box.
Text Shape - This is where you can choose a shape for your text box, as I did for this box. You can also edit the path lines when you inserted a text path from the Insert ribbon. You can make your text go all around your page edge.