Type plain text, then use the controls to style it.
Select part of the text to style only that part, or leave it blank to style everything.
Click anywhere on the gradient bar to add a new stop. Drag stops to move them.
<b>...</b><i>...</i><u>...</u><#rrggbb>...</#rrggbb><rotate=step>...</rotate>index × step degrees.<rainbow>...</rainbow><gradient=#a,#b,#c>...</gradient><font=name>...</font>