TRY KEYBOARD SHORTCUT FIRST
If this doesn't work then use the formatting tool found in the Post Composer's Toolbar
Directions for Using Text Formatting Tool
- Highlight the text in the composer window
- Select the text formatting tool
- Click the Post Save Button
That's all Folks! Now pick out a font style, size, color and etc... Once done composing the post don't forget the Save followed by clicking the orange publish button.