The content you type and format for the Question Stem and Answer Option area is saved in HTML code. If you are familiar with HTML, you can edit the HTML code:
Edit the HTML tags as required.
See Supported HTML Elements and Attributes for a list of all the supported HTML tags. If you enter unsupported HTML tags, the editor warns you they are unsupported, or it strips out the unsupported tags.
Tabs are now supported in the Rich Text Editor for standard text.