The question stem and the answer options can be formatted using the formatting toolbar just above the text.
All of the icons on the toolbar are described here:
Make the selected text bold, italicize, underline and/or strikethrough.
Add subscript or superscript format to the selected text.
Change the font style of the selected text.
Change the font size of the selected text.
Place the selected text in a bulleted or numbered list.
Insert/edit link or unlink the selected text.
Cut or copy the selected text.
Paste or paste as plain text or paste from word.
Find or find/replace the selected text.
Increase or decrease indent or blockquote the selected text.
Reverse the immediately preceding action that was performed with either the keyboard or mouse.
Toggle between the full screen and regular view of the selected fields.
Preview the text.
Change the color of the selected text.
Check spelling of the selected text.
Add mathematical formulas. For more details click http://www.fmath.info/plugins/TinyMCE/jscripts/tiny_mce/plugins/fmath_formula/mathml/lookAndFeel/fMathEditor.pdf
Add assets to the questions or answer options as required.
Edit the HTML source code of the entered text. Click 2.7.1 Working with HTML Content for more details on working with HTML content.
Insert a new table or modify the existing table in the question stem or answer option. Click 2.7.2 Inserting table and its formatting for more details on inserting a table and its formatting.
Set the properties of the row and cell in a table.
Insert row before and/or insert row after selected row, or delete rows in a table.
Insert columns before and/or after selected column, or delete columns in a table.
Split merged tables/cells and/or merge tables/cells in a table.
Insert horizontal ruler.
Remove all formatting from the selected text.
Cleanup messy code.
Toggle guidelines/invisible elements.
Insert a custom character. This icon brings up a window that shows all the available custom characters: